1. Contribution to the investigation of the mechanical activation in fine grinding mills;Bernhardt,1976
2. Structural changes, energy accumulation and increase of reactivity — a contribution to grinding and mechanical activation of solids;Bernhardt,1982
3. Grinding and mechanical activation in mill with calorimeter;Bernhardt,1980
4. Active states;Fricke,1943
5. VI. The phenomena of rupture and flow in solids