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@article{DM_1993_5_1_a7, author = {L. A. Arutyunyan}, title = {On the lattice of closed classes of nonhomogeneous functions with a~trace of type~$C$}, journal = {Diskretnaya Matematika}, pages = {130--145}, publisher = {mathdoc}, volume = {5}, number = {1}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DM_1993_5_1_a7/} }
L. A. Arutyunyan. On the lattice of closed classes of nonhomogeneous functions with a~trace of type~$C$. Diskretnaya Matematika, Tome 5 (1993) no. 1, pp. 130-145. http://geodesic.mathdoc.fr/item/DM_1993_5_1_a7/