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@article{DAN_1968_182_2_a11, author = {E. S. Usachev}, title = {Asymptotic properties and the approximation of stochastic models of teaching}, journal = {Doklady Akademii Nauk}, pages = {282--284}, publisher = {mathdoc}, volume = {182}, number = {2}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_182_2_a11/} }
E. S. Usachev. Asymptotic properties and the approximation of stochastic models of teaching. Doklady Akademii Nauk, Tome 182 (1968) no. 2, pp. 282-284. http://geodesic.mathdoc.fr/item/DAN_1968_182_2_a11/