@article{AM2_1997__53_1-2_137688,
     author = {Peter Adams and Darryn E. Bryant},
     title = {i-perfect m-cycle systems, m...19.},
     journal = {Aequationes mathematicae},
     pages = {275--294},
     publisher = {mathdoc},
     volume = {53},
     number = {1-2},
     year = {1997},
     zbl = {0883.05110},
     url = {http://geodesic.mathdoc.fr/item/AM2_1997__53_1-2_137688/}
}