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- Kiekegaard-Hansen, P..: “Lok-Strength”, Nordisk Betong 3-1975
- Jensen, B.C. & Bræstrup, M.W.: ”Lok-Test determine the compressive strength of concrete”, Nordisk Betong 2-1976
- Kierkegaard-Hansen, P.: “LOK-TEST until today Oct. 1978, Historical background”, Danish Engineering Academy, 1978
- Ottosen, N.S.: “Influence on pullout strength in relation to change in depth for the LOK-TEST and the CAPO TEST”, Copenhagen, Denmark, 1978
- Kierkegaard-Hansen, P. & Bickley, J.A.: “In-situ strength evaluation of concrete by the LOK-TEST system”, ACI Fall Convention, Nov. 3rd, 1978
- Trow Group: “Special Mix, Fast Test Speed Building Job”, Heavy Construction News, Oct 1978
- Drinkgern, G.: “Neuartige Erhärtungsprüfung an Bauteilen aus Beton”, Fertigteile Beton Werkstein, Sonderdruck Heft 2/78 (in German)
- Bickley, J.A.: “Sample proposal for the use of Lok-Test on a project”, University of Liverpool, Dec., 2000
- Petersen, C.G.: “CAPO-TEST”, Nordisk Betong, 5-6, 1980
- Ottosen, N.S.: “Nonlinear Finite Element Analysis of Pull-Out Test”, Journal of the Structural Division, ASCE, Vol. 107, No. ST4, April 1981
- Bickley, J.A. & Fasullo, S.: “Analysis of pull-out test data from Construction sites”, Transportation Research Board, Washington, USA, Jan 1981
- Krenchel, H.: “LOK-Styrkeprøvning og CAPO-Styrkeprøvning af Betons Trykstyrke”, Department of Structural Engineering, Technical University of Denmark, Serie I, No 71, 1982 (in Danish)
- Bickley, J.A.: “The Variability of Pullout Tests and In-Place Concrete Strength”, Concrete International, April 1982
- Hubler, R.L.: “Developer Saves Time, Reduce Interest Costs with New Concrete Testing System”, Canadian Building Magazine, Jan. 1982
- Bickley, J.A.: “The Evaluation and Acceptance of Concrete Quality by In-Place Testing”, SP 82-6, ACI
- Bellander, U.: “Kvalitetskontroll av Betonkonstruktioner”, Nordisk Betong 3-4 1983 (in Swedish)
- Petersen, C.G.: ”LOK-test and CAPO-Test development and their applications”, Proc. Inst´n Civ. Engrs, Part 1, Vol 76, May 1984
- Krenchel, H. & Petersen, C.G.: In-Situ Pullout Testing with LOK-TEST, Ten Years Experience”, Int. Conf. on In-Situ / Non-Destructive Testing of Concrete, Canmet, ACI, Canadian Society for Civil Engineers and National Bureau of Standards, Ottawa, Canada, Oct 2-5, 1984
- Bickley, J.A.: “Trinity Square: Commentary on Concrete”, Cement and Concrete Aggregates, ASTM, 1984
- Bickley, J.A.: “Cost Effectiveness of In-Situ Testing”, CANMET/ACI Intnl. Conference on In-Situ/NonDestructive Testing of Concrete, Ottawa, Oct 2, 1984
- Krenchel, H. & Mossing, P.: “LOK-Styrkeprøvning af Beton, Brudmekanisk Analyse”, Department of Structural Engineering, Technical University of Denmark, Serie R, No 198, 1985 (in Danish)
- Krenchel, H. & Shah, S.P.: “Fracture Analysis of the Pull-Out Test”, RILEM, Materials and Structures, November-December 1985, No 108
- Krenchel, H. & Bickley, J.A.: “Pullout Testing of Concrete, Historical Background and Scientific Level Today”, Nordic Concrete Research, The Nordic Concrete Federation, Publication No. 6, 1987
- Bickley, J.A.: “Achieving Safety and Economy in High Rise Concrete Structures through the use of InPlace Testing”, Third International Conference on Tall Buildings, Chicago, USA, Jan. 1986
- Jensen, J.Kr.J., “Influence of Stresses in a Structure on the LOK-TEST Pullout Force”, Department of Building Technology and Structural Engineering, AUC, Denmark, 1987
- Stone, W.C., Carino, N.J. & Reeve, C.P.: “Statistical Methods for In-Place Strength Predictions by the Pullout Test”, ACI Journal, Technical Paper, Sept – Oct 1986
- Carino, N.J.: “Statistical Methods to Evaluate In-Place Test Results”, RILEM, Testing during concrete construction, Proceedings, Chapman and Hall, 1990
- Yun, C.H., Choi, K.R., Kim, S.Y. and Song, Y.C.: “Comparative Evaluation of Nondestructive Test Methods for In-Place Strength Determination”, Special Publication SP 112, American Concrete Institute, 1990
- Worthers, P.H.: “In-Situ Compressive Strength Testing of Precast Concrete Tunnel Lining Segments using CAPO-TEST”, Translink Joint Venture, Construction Materials Management, November 1990
- Petersen, C.G.: In-Place Testing for Quality Assurance and Early Loading Operations with Pullout Testing and Maturity Measurements”, in Testing during Concrete Construction, Chapman and Hall, RILEM Workshop, Mainz, March 1990.
- Petersen, C.G. & Poulsen, E.: ”Pull-Out Testing by LOK-TEST and CAPO-TEST with particular reference to the Great Belt Link, Danish Concrete Institute, 1993
- Great Belt Link: “LOK and CAPO Tests, The experience of pull-out testing during The Great Belt Link (Storebælt) project in Denmark, Storebæltsforbindelsen, Denmark, 1999
- Bickley, J.A. & Hindo, K.R.: “How to Build Faster for Less – The Role of In-Place Testing in Fast Track Construction”, ACI Spring Convention, March 20, 1994
- Bishr, A.M., Al-Armoudi, O.S.B, Basanbul, I. & Al-Sulalmani, G.: “Assessment of concrete compressive strength using the Lok-Test”, Construction and Building Materials 1995, Vol. 9, No 4.
- Petersen, C.G.: “LOK-TEST and CAPO-TEST pullout testing, Twenty Years Experience”, British Insitute of Non-Destructive Testing, Non-Destructive Testing in Civil Engineering Conference in Liverpool, April 8-11, 1997
- Soutsos, M.N., Bungey, J.H. & Long, A.E.: “In-Situ Strength Assessment of Concrete, The European Concrete Frame Building Project”, Department of Civil Engineering, University of Liverpool, UK, 1999 enclosed Strength Development Monitoring Case Studies
- BCA, BRE, Construct, Reinforced Concrete Counsil & DETR: “Early age strength assessment of concrete on site”, Best Practice Guides for In-Situ Concrete Frame Buildings, J.H. Bungey, A.E.Long, M.N. Soutsos & G.D. Henderson, BRE Report 387, CRC Ltd, UK, 2000
- Moczko, A.: “Comparison between compressive strength tests from cores, Capo-Test and Schmidt Hammer”, Department of Civil Engineering, Wroclaw University, Poland, 2008
- Bickley, J.A.: “A Brief History of Pullout Testing: With Particular Reference to Canada, A Personal Journey”, International Conference on Non-Destructive Testing, ACI, Seville, Spain, Oct 2009
- Thun, H., Ohlsson, U. & Elfgren, L.: “Determination of Concrete Compressive Strength with Pullout Tests”, Structural Concrete Journal of the fib, Thomas Telford 2009
- Moczko, A., Carino, N.J. & Petersen, C.G.: “CAPO-TEST to Estimate Concrete Strength in Bridges”, ACI Materials Journal, Technical Paper, No 113-M76, November – December 2016
- Zhengqi, Li, Desai, J. & Wesley B.: “In-Place Estimation of Concrete Compressive Strength Using Postinstalled Pullout Tets – A Case Study”, Journal of Testing and Evaluation, ASTM, August31, 2018
- Poulsen, E.: “Note on the determination of Characteristic Value of Observations”, Copenhagen, Denmark, 2001
- Correlation procedure for establishing the relation of pullout force versus cylinder compressive strength