1- Energy Measurements and Correlations of the Standard Penetration Test (SPT) and the Becker Penetration Test (BPT), 1993, Alexander Sy, R.G. Campanella (UBC)
2- Becker and Standard Penetration Tests (BPT-SPT) Correlations with Consideration of Casing Friction, Canadian Geotechnical Journal 1994, Alexander Sy, R.G. Campanella (UBC)
3- BPT-SPT Correlations for Evaluation of Liquefaction Resistance in Gravelly Soils, ASCE National Convention 1995, Alexander Sy, R.G. Campanella, R.A. Stewart