@article{ZNSL_1996_234_a10,
     author = {O. E. Orel},
     title = {Topological properties of a~rotation function in integrable {Jacobi} problem for geodesics on ellipsoid},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {143--152},
     publisher = {mathdoc},
     volume = {234},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1996_234_a10/}
}