@article{MZM_1997_62_3_a7,
     author = {A. V. Loboda},
     title = {Sphericity of rigid hypersurfaces in $\mathbb C^2$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {391--403},
     publisher = {mathdoc},
     volume = {62},
     number = {3},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1997_62_3_a7/}
}