@article{JAC_2001__13_1_a2,
     author = {Hamilton, Nicholas and Penttila, Tim},
     title = {Sets of type $(a,b)$ from subgroups of $\Gamma L (1, p^R)$},
     journal = {Journal of Algebraic Combinatorics},
     pages = {67--76},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2001__13_1_a2/}
}