@article{DAN_1961_139_6_a0,
     author = {M. A. Akivis},
     title = {$n$-dimensional surfaces bearing a net of conjugate lines},
     journal = {Doklady Akademii Nauk},
     pages = {1279--1282},
     publisher = {mathdoc},
     volume = {139},
     number = {6},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_139_6_a0/}
}