@article{FPM_1995_1_4_a7,
     author = {G. A. Kovaleva},
     title = {Non-existence of closed asymptotic curves on the tubes of negative {Gaussian} curvature with one-to-one spherical mapping},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {953--977},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1995_1_4_a7/}
}