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@article{IVM_1966_2_a11, author = {A. M. Panov}, title = {On exponents of iteration systems}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {83--92}, publisher = {mathdoc}, number = {2}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1966_2_a11/} }
A. M. Panov. On exponents of iteration systems. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1966), pp. 83-92. http://geodesic.mathdoc.fr/item/IVM_1966_2_a11/