@article{DAN_1963_148_1_a12,
     author = {D. Mangeron and E. Croitoru},
     title = {A contribution to the general theory of reduced velocities in tangential coordinates},
     journal = {Doklady Akademii Nauk},
     pages = {54--56},
     publisher = {mathdoc},
     volume = {148},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_148_1_a12/}
}