@article{ZNSL_1991_193_a5,
     author = {G. B. Mikhalkin},
     title = {Some congruences for real algebraic curves on an ellipsoid},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {90--100},
     publisher = {mathdoc},
     volume = {193},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1991_193_a5/}
}