1. Lectures Notes in Computer Science;Brassard G.,1998
2. Corsini, P., Eugeni, F. and Maturo, A., eds. Hyperstructures and their applications in cryptography, geometry and uncertainty treatment. Proceedings of the 1st International congress (HACGUT). December9–101994, Chieti, Italy. Pescara: Libreria dell’Università Editrice.