@article{DAN_1960_134_5_a5,
     author = {I. A. Sokolenko},
     title = {Triangles in riemannian spaces with a pole},
     journal = {Doklady Akademii Nauk},
     pages = {1021--1023},
     publisher = {mathdoc},
     volume = {134},
     number = {5},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_134_5_a5/}
}