1. Ventilation planning for underground coal mines;McPherson;Annual Rept, U.S. Dept of Energy, Contract W-7405-ENG-48,1981
2. Effect of stress on permeability of coal;Somerton;Final Rept, USBM Contract H0122027,1974
3. Flow of gas through stressed carboniferous strata;Gawuga,1979
4. An investigation into the changes of permeability occuring in sandstone when failed under triaxial stress conditions;Mordecai,1971