@article{KUTGS_1976_9_a1,
     author = {S. L. Atanasyan and Kh. K. Abdurakhmanova and V. P. Gur'eva},
     title = {Complex and double polar coordinates in line manifolds of three-dimensional {quasi-non-Euclidean} spaces},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {5--10},
     year = {1976},
     volume = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_1976_9_a1/}
}