publication venue for

• Stress state in the Ruhr coalfield.  31:A86-A86. 1994
• Fundamentals for the design and construction of tunnels in swelling rock.  17:A117-A117. 1980
• The Leaning Tower of Pisa - a suggested remedial measure 1976
• Model tests concerning the interaction of ground and roof support in gate-roads.  1:319-326. 1964
• The origin of roof falls in starting faces with the caving system.  1:313-318. 1964