@article{DAN_1973_212_1_a14,
     author = {\`E. A. Yarv},
     title = {Zolotarev critical intervals},
     journal = {Doklady Akademii Nauk},
     pages = {60--63},
     publisher = {mathdoc},
     volume = {212},
     number = {1},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_1_a14/}
}