@article{DAN_1966_166_4_a6,
     author = {L. G. Mikhailov and Z. D. Usmanov},
     title = {Infinitesimal bendings of surfaces of revolution with positive curvature having a conic or a parabolic point at the pole},
     journal = {Doklady Akademii Nauk},
     pages = {791--794},
     publisher = {mathdoc},
     volume = {166},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_4_a6/}
}