1. Effects of approximately vertical cracks on the behavior of horizontally lying roof strata;Bucky;Trans Aime,1934
2. Effects of immediate roof thickness in longwall mining as determined by barodynamic experiments;Bucky;Trans Am Inst Min Met Eng,1938
3. Merrill RHDesign of Underground Mine Openings, Oil-Shale Mine, Rifle, Colorado. U.S.B.M. R.I. 5089; 1954.
4. Rock bolting in the voussoir beam;Corlett;Trans Can Inst Min Met,1956
5. The strength of undermined strata;Evans;Trans Inst Min Metall,1941