Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1979_5_a11, author = {Ya. P. Tsyrulis}, title = {Theories with inclusion}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {83--86}, publisher = {mathdoc}, number = {5}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1979_5_a11/} }
Ya. P. Tsyrulis. Theories with inclusion. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1979), pp. 83-86. http://geodesic.mathdoc.fr/item/IVM_1979_5_a11/