Divisibility properties of subgroup numbers for the modular group.
Müller, T.W. ; Schlage-Puchta, J.-C.
The New York Journal of Mathematics [electronic only], Tome 11 (2005), p. 205-224 / Harvested from The Electronic Library of Mathematics
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Publié le : 2005-01-01
EUDML-ID : urn:eudml:doc:127284 
@article{02245707,
     title = {Divisibility properties of subgroup numbers for the modular group.},
     journal = {The New York Journal of Mathematics [electronic only]},
     volume = {11},
     year = {2005},
     pages = {205-224},
     zbl = {1111.20042},
     language = {en},
     url = {http://dml.mathdoc.fr/item/02245707}
}

Müller, T.W.; Schlage-Puchta, J.-C. Divisibility properties of subgroup numbers for the modular group.. The New York Journal of Mathematics [electronic only], Tome 11 (2005) pp. 205-224. http://gdmltest.u-ga.fr/item/02245707/