TY - JOUR AU - V. F. Demyanov AU - M. V. Dolgopolik TI - Codifferentiable functions in Banach spaces: methods and applications to problems of variation calculus JO - Vestnik Sankt-Peterburgskogo universiteta. Prikladnaâ matematika, informatika, processy upravleniâ PY - 2013 SP - 48 EP - 66 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VSPUI_2013_3_a5/ LA - ru ID - VSPUI_2013_3_a5 ER -