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@article{MZM_1980_28_1_a16, author = {A. M. Mukhamedov}, title = {Almost-projective mappings of gravitational fields}, journal = {Matemati\v{c}eskie zametki}, pages = {131--137}, publisher = {mathdoc}, volume = {28}, number = {1}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_1_a16/} }
A. M. Mukhamedov. Almost-projective mappings of gravitational fields. Matematičeskie zametki, Tome 28 (1980) no. 1, pp. 131-137. http://geodesic.mathdoc.fr/item/MZM_1980_28_1_a16/