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On the number of subgroups of given index in the modular group.
Monatshefte für Mathematik, Tome 87 (1979), pp. 273-280 Cet article a éte moissonné depuis la source European Digital Mathematics Library

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Mots-clés : Number of Subgroups of Given Index in the Modular Group 
@article{MOMA_1979__87_177918,
     author = {W. Imrich and R. Razen},
     title = {On the number of subgroups of given index in the modular group.},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {273--280},
     year = {1979},
     volume = {87},
     zbl = {0407.20037},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1979__87_177918/}
}
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EP  - 280
VL  - 87
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ID  - MOMA_1979__87_177918
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%0 Journal Article
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%A R. Razen
%T On the number of subgroups of given index in the modular group.
%J Monatshefte für Mathematik
%D 1979
%P 273-280
%V 87
%U http://geodesic.mathdoc.fr/item/MOMA_1979__87_177918/
%F MOMA_1979__87_177918
W. Imrich; R. Razen. On the number of subgroups of given index in the modular group.. Monatshefte für Mathematik, Tome 87 (1979), pp. 273-280. http://geodesic.mathdoc.fr/item/MOMA_1979__87_177918/