TY - CONF A1 - Helms, Rolf A1 - Naseband, Klaus T1 - A ductile fracture criterion for metals T2 - Proceedings of the International Conference on Fracture T2 - 4th International Conference on Fracture CY - Waterloo, Canada DA - 1977-06-19 PY - 1977 VL - 2 IS - MS45 SP - 503 EP - 512 CY - [Wechselnde Verlagsorte] AN - OPUS4-8598 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -