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@article{IVM_1990_6_a15, author = {M. I. \`Eidinov}, title = {Height-two elements of the lattice of formations of finite groups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {77--80}, publisher = {mathdoc}, number = {6}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1990_6_a15/} }
M. I. Èidinov. Height-two elements of the lattice of formations of finite groups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1990), pp. 77-80. http://geodesic.mathdoc.fr/item/IVM_1990_6_a15/