@article{INTG_1981_12_a0,
     author = {\"U. G. Lumiste and A. V. Chakmazyan},
     title = {Normal connection and submanifolds with parallel normal fields in a~space of constant curvature},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {3--30},
     publisher = {mathdoc},
     volume = {12},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1981_12_a0/}
}