1. The measurement of rock pressure in mines;Hast;Årsb. Sver. geol. Unders.,1958
2. Pre-mining lateral stresses;Seagar;Int. J. Rock Mech. Min. Sci.,1964
3. Beziehung zwischen grossen horizontalen Spannungen im Gebirge und der Tektonik und der Abtragung;Voight,1966
4. The state of stress in the upper part of the Earth's crust;Hast;Tectonophysics,1969
5. The state of stress in the Earth's crust as based on measurements in mines and on geophysical data;Kropotkin;Phys. Earth Planet. Interiors,1972