TY - JOUR T1 - Bifurcations in finite element models with a non-associated flow law JO - International Journal for Numerical and Analytical Methods in Geomechanics PY - 1988/01/01 AU - De Borst R ED - DO - DOI: 10.1002/nag.1610120107 PB - Wiley VL - 12 IS - 1 SP - 99 EP - 116 Y2 - 2024/12/22 ER -