@article{MS2_1957__5_165671,
     author = {H.S.M. COXETER and W.O.J. MOSER},
     title = {Generators and relations for discrete groups {(JAKOB} {NIELSEN)}},
     journal = {Mathematica Scandinavica},
     pages = {291--293},
     publisher = {mathdoc},
     volume = {5},
     year = {1957},
     zbl = {0077.02801},
     url = {http://geodesic.mathdoc.fr/item/MS2_1957__5_165671/}
}