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@article{IVM_1977_3_a5, author = {E. K. Leont'ev}, title = {$r$-orthogonal compositions and their classification in {Weyl} and {Riemannian} spaces}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {43--52}, publisher = {mathdoc}, number = {3}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1977_3_a5/} }
E. K. Leont'ev. $r$-orthogonal compositions and their classification in Weyl and Riemannian spaces. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1977), pp. 43-52. http://geodesic.mathdoc.fr/item/IVM_1977_3_a5/