@article{MZM_2003_73_1_a7,
     author = {L. A. Masal'tsev},
     title = {A {Version} of the {Ruh--Vilms} {Theorem} for {Surfaces} of {Constant} {Mean} {Curvature} in $S^3$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {92--105},
     publisher = {mathdoc},
     volume = {73},
     number = {1},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_73_1_a7/}
}