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@article{MASLO_1973__23_2_a1, author = {\v{Z}embery, Ivan}, title = {The {Embedding} of {Some} {Lattices} into {Lattices} of {All} {Subgroups} of {Free} {Groups}}, journal = {Mathematica slovaca}, pages = {103--105}, publisher = {mathdoc}, volume = {23}, number = {2}, year = {1973}, mrnumber = {0329986}, zbl = {0272.20032}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1973__23_2_a1/} }
Žembery, Ivan. The Embedding of Some Lattices into Lattices of All Subgroups of Free Groups. Mathematica slovaca, Tome 23 (1973) no. 2, pp. 103-105. http://geodesic.mathdoc.fr/item/MASLO_1973__23_2_a1/