@article{10_1017_S2040618500033396,
     author = {Yacoub, K. B.},
     title = {On {Semi-Special} {Permutations} {I}},
     journal = {Glasgow mathematical journal},
     pages = {18--35},
     year = {1956},
     volume = {2},
     number = {1},
     doi = {10.1017/S2040618500033396},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S2040618500033396/}
}