TY - THES A1 - Backers, Tobias T1 - Fracture toughness determination and micromechanics of rock under Mode I and Mode II loading Y1 - 2005 DO - 10.23689/fidgeo-514 PB - GFZ CY - Helmholtz-Zentrum UR - http://hdl.handle.net/11858/00-1735-0000-0001-3292-0 ER -