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@article{AL_1981_20_4_a3, author = {A. A. Nikitin}, title = {Homomorphisms of freely generated projective planes}, journal = {Algebra i logika}, pages = {419--426}, publisher = {mathdoc}, volume = {20}, number = {4}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1981_20_4_a3/} }
A. A. Nikitin. Homomorphisms of freely generated projective planes. Algebra i logika, Tome 20 (1981) no. 4, pp. 419-426. http://geodesic.mathdoc.fr/item/AL_1981_20_4_a3/