TY - JOUR T1 - A unified approach to the implicit integration of standard, non-standard and viscous plasticity models JO - International Journal for Numerical and Analytical Methods in Geomechanics PY - 2002/09/01 AU - de Borst R AU - Heeres OM ED - DO - DOI: 10.1002/nag.234 PB - Wiley VL - 26 IS - 11 SP - 1059 EP - 1070 Y2 - 2024/12/25 ER -