Bonner mathematische Schriften. Nr. 386 : Interior stress regularity for the Prandtl Reuss and Hencky model of perfect plasticity using the Perzyna approximation / D. Lobach, 2007. - 53 p. - Текст : непосредственный.
Bonner mathematische Schriften. Nr. 388 : On regularity for plasticity with hardening / D. Lobach, 2008. - 31 p. - Текст : непосредственный.