@article{DAN_1980_250_6_a2,
     author = {S. L. Ziglin},
     title = {Nonintegrability of a problem on the motion of four point vortices},
     journal = {Doklady Akademii Nauk},
     pages = {1296--1300},
     publisher = {mathdoc},
     volume = {250},
     number = {6},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_250_6_a2/}
}