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@article{PFMT_2010_4_a10, author = {L. A. Shemetkov}, title = {A note on $\mathfrak{X}$-local formations}, journal = {Problemy fiziki, matematiki i tehniki}, pages = {61--62}, publisher = {mathdoc}, number = {4}, year = {2010}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PFMT_2010_4_a10/} }
L. A. Shemetkov. A note on $\mathfrak{X}$-local formations. Problemy fiziki, matematiki i tehniki, no. 4 (2010), pp. 61-62. http://geodesic.mathdoc.fr/item/PFMT_2010_4_a10/