TY - BOOK AU - Lobach,Dominique TI - Interior stress regularity for the Prandtl Reuss and Hencky model of perfect plasticity using the Perzyna approximation PY - 2007/// CY - Bonn PB - [Mathematisches Institut der Universitat] KW - Mathematics N1 - Includes bibliogr. references : (p. 51-53) ER -