@article{ND_2008_4_4_a7,
     author = {A. V. Borisov and L. A. Gazizullina and S. M. Ramodanov},
     title = {E.~Zermelo {Habilitationsschrift} on vortex hydrodynamics on a sphere},
     journal = {Russian journal of nonlinear dynamics},
     pages = {497--513},
     publisher = {mathdoc},
     volume = {4},
     number = {4},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ND_2008_4_4_a7/}
}