International Conference on Combinatorial Geometrics and their Applications.International Conference on Combinatorial Geometrics and their Applications(1981 : Rome)：Combinatorial`81 in honour of Beniamino Segre; Proceedings of the Conference, Rome, June7-12,1981.North-Holland,1983.
International Conference on Combinatorial Geometrics and their Applications(1981 : Rome)：Combinatorial`81 in honour of Beniamino Segre; Proceedings of the Conference, Rome, June7-12,1981
International Conference on Combinatorial Geometrics and their Applications.North-Holland,1983.
