%0 Journal Article %A Viacheslav V. Nikulin %T Classification of Degenerations and Picard Lattices of K\"ahlerian K3 Surfaces with Symplectic Automorphism Group $C_4$ %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2019 %P 148-179 %V 307 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2019_307_a7/ %G ru %F TM_2019_307_a7