@article{04069131, title = {Recent results in hyperring and hyperfield theory.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {11}, year = {1988}, pages = {209-220}, doi = {10.1155/S0161171288000250}, zbl = {0655.16027}, language = {en}, url = {http://dml.mathdoc.fr/item/04069131} }
Nakassis, Anastase. Recent results in hyperring and hyperfield theory.. International Journal of Mathematics and Mathematical Sciences, Tome 11 (1988) pp. 209-220. doi : 10.1155/S0161171288000250. http://gdmltest.u-ga.fr/item/04069131/