@article{DAN_1961_137_6_a14,
     author = {N. S. Sinyukov},
     title = {An invariant transformation of {Riemannian} spaces with common geodesics},
     journal = {Doklady Akademii Nauk},
     pages = {1312--1314},
     publisher = {mathdoc},
     volume = {137},
     number = {6},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_6_a14/}
}