@article{CRMATH_2011__349_3-4_127_0,
     author = {Sahin, Recep and Koruo\u{g}lu, \"Ozden},
     title = {Commutator subgroups of the power subgroups of {Hecke} groups $ H({\lambda }_{q})$ {II}},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {127--130},
     publisher = {Elsevier},
     volume = {349},
     number = {3-4},
     year = {2011},
     doi = {10.1016/j.crma.2011.01.003},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2011.01.003/}
}