@article{MZM_1993_53_6_a3,
     author = {N. Sh. Zagirov},
     title = {Rational snakes},
     journal = {Matemati\v{c}eskie zametki},
     pages = {33--40},
     publisher = {mathdoc},
     volume = {53},
     number = {6},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_53_6_a3/}
}