@article{SM_2002_193_10_a4,
     author = {V. A. Mirzoyan},
     title = {Submanifolds with semiparallel tensor fields as envelopes},
     journal = {Sbornik. Mathematics},
     pages = {1493--1505},
     publisher = {mathdoc},
     volume = {193},
     number = {10},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_10_a4/}
}