@article{DAN_1961_139_3_a5,
     author = {E. T. Ivlev},
     title = {Coordinate frames of submanifolds in the theory of pairs of complexes in $P_3$},
     journal = {Doklady Akademii Nauk},
     pages = {538--540},
     publisher = {mathdoc},
     volume = {139},
     number = {3},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_139_3_a5/}
}