@article{IVM_1974_5_a18,
     author = {\"U. G. Lumiste and A. V. Chakmazyan},
     title = {Submanifolds with parallel normal vector field},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {148--157},
     publisher = {mathdoc},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1974_5_a18/}
}