@article{PMF_1909_20_1_a4,
     author = {Miller, G. A.},
     title = {Groups generated by two operators satisfying the condition $s_1 s_2 = s_2^{-1}s_1^n$},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {193--197},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1909},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PMF_1909_20_1_a4/}
}