@article{DAN_1980_254_6_a5,
     author = {O. Ya. Viro},
     title = {Curves of degree $7$, curves of degree $8$, and the {Ragsdale} conjecture},
     journal = {Doklady Akademii Nauk},
     pages = {1306--1310},
     publisher = {mathdoc},
     volume = {254},
     number = {6},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_254_6_a5/}
}