TY - CONF T1 - Efficient and robust low-order elements for 2D- and 3D-soil plasticity JO - COMPUTER METHODS AND ADVANCES IN GEOMECHANICS, VOL 1 PY - 1997/01/01 AU - de Borst R AU - Groen AE ED - SP - 95 EP - 104 Y2 - 2024/12/25 ER -