@article{DAN_1981_259_5_a5,
     author = {A. N. Rudakov and I. R. Shafarevich},
     title = {On the degeneration of surfaces of type $K3$},
     journal = {Doklady Akademii Nauk},
     pages = {1050--1052},
     publisher = {mathdoc},
     volume = {259},
     number = {5},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_259_5_a5/}
}