@article{10_1017_S0017089500003025,
     author = {McLain, D. H.},
     title = {An algorithm for determining defining relations of a subgroup},
     journal = {Glasgow mathematical journal},
     pages = {51--56},
     year = {1977},
     volume = {18},
     number = {1},
     doi = {10.1017/S0017089500003025},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003025/}
}