Free subgroups and normal subgroups of the modular group
Newman, Morris
Illinois J. Math., Tome 8 (1964) no. 4, p. 262-265 / Harvested from Project Euclid
Text on Project Euclid
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Publié le : 1964-06-15
Classification:  20.65 
@article{1256059670,
     author = {Newman, Morris},
     title = {Free subgroups and normal subgroups of the modular group},
     journal = {Illinois J. Math.},
     volume = {8},
     number = {4},
     year = {1964},
     pages = { 262-265},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1256059670}
}

Newman, Morris. Free subgroups and normal subgroups of the modular group. Illinois J. Math., Tome 8 (1964) no. 4, pp.  262-265. http://gdmltest.u-ga.fr/item/1256059670/