@article{IVM_1959_2_a16,
     author = {V. V. Vishnevskii and A. P. Norden},
     title = {On complex representation of the invariants of a~four-dimensional {Riemannian} space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {176--182},
     publisher = {mathdoc},
     number = {2},
     year = {1959},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1959_2_a16/}
}