@article{10_1017_S0017089512000298,
     author = {STOTHERS, W. WILSON},
     title = {SUBGROUPS {OF} {FINITE} {INDEX} {IN} (2, 3, {n)-TRIANGLE} {GROUPS}},
     journal = {Glasgow mathematical journal},
     pages = {693--714},
     year = {2012},
     volume = {54},
     number = {3},
     doi = {10.1017/S0017089512000298},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089512000298/}
}