1. A resolvable quadruple system of order 20;Booth;Ars Combin.,1978
2. Some remarks on resolvable quadruple systems;Greenwell;Ars Combin.,1978
3. On quadruple systems;Hanani;Canad. J. Math.,1960
4. Resolvable Steiner quadruple systems;Hartman;Ars Combin.,1980
5. Tripling quadruple systems;Hartman;Ars Combin.,1980