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@article{IVM_1990_10_a0, author = {S. V. Ketov}, title = {Modular invariance, self-dual lattices in heterotic string theory in $D\le 10$}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {3--8}, publisher = {mathdoc}, number = {10}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1990_10_a0/} }
S. V. Ketov. Modular invariance, self-dual lattices in heterotic string theory in $D\le 10$. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1990), pp. 3-8. http://geodesic.mathdoc.fr/item/IVM_1990_10_a0/