@article{VMUMM_1984_6_a2,
     author = {S. Yu. Orevkov},
     title = {Surgery of level hypersurfaces of a direct sum of two functions},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {10--13},
     publisher = {mathdoc},
     number = {6},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1984_6_a2/}
}