1. Deformation of a Borehole in Rock;R H Merrill;Bureau of Mines Dept. of Inv,1961
2. Dreidimensionale Spannungsumlagerungen prozesse im Bereich der Ortsbrust;L M�ller;Rock Mech,1978
3. Petroscopic Observations of Rock Fracturing Ahead of Stope Faces in Deep-Level Gold Mines;G R Adams;Journal of the South African institute of mining and metallurgy,1980