TY - JOUR AU - Viacheslav V. Nikulin TI - Classification of Degenerations and Picard Lattices of K\"ahlerian K3 Surfaces with Symplectic Automorphism Group $C_4$ JO - Informatics and Automation PY - 2019 SP - 148 EP - 179 VL - 307 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_2019_307_a7/ LA - ru ID - TRSPY_2019_307_a7 ER -