TY - JOUR AU - S. K. Vodop'yanov AU - A. D.-O. Ukhlov TI - Superposition operators in Lebesgue spaces and the differentiability of quasi-additive set functions JO - Vladikavkazskij matematičeskij žurnal PY - 2002 SP - 11 EP - 33 VL - 4 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMJ_2002_4_1_a1/ LA - ru ID - VMJ_2002_4_1_a1 ER -