1. Statistical Analysis of Crude Oil Recovery and Recovery Efficiency,1984
2. A Statistical Study of Recovery Efficiency,1967
3. A Factual Analysis of the Effect of Well Spacing on Oil Recovery;Craze;Drill. & Prod. Prac., API,1945
4. The Use of Multiple-Correlation Analyses for Interpreting Petroleum-engineering Data;Guthrie;Drill. & Prod. Prac., API,1955
5. Statistical Analysis Shows Crude-Oil Recovery;Doscher;Oil & Gas J.,1984