TY - JOUR AU - Frehse, Jens AU - Specovius-Neugebauer, Maria TI - Fractional Interior Differentiability of the Stress Velocities to Elastic Plastic Problems with Hardening JO - Bollettino della Unione matematica italiana PY - 2012 SP - 469 EP - 494 VL - 5 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/BUMI_2012_9_5_3_a1/ LA - en ID - BUMI_2012_9_5_3_a1 ER -