@article{journals/dm/ProcesiR99, title = {On some classes of hyperstructures.}, author = {Rita Procesi and Rosaria Rota}, journal = {Discrete Mathematics}, pages = {485-497}, url = {http://dblp.uni-trier.de/db/journals/dm/dm208.html#ProcesiR99}, volume = {208-209}, year = {1999}, biburl = {http://www.bibsonomy.org/bibtex/241ac5d9b4862e97520bfb3ab83aefe54/dblp}, description = {dblp}, ee = {http://dx.doi.org/10.1016/S0012-365X(99)00092-8}, date = {2008-02-21}, keywords = {dblp } }