==See also==*Ring (algebra)*Ring of sets*Valuation algebra==Notes====Bibliography==* François Baccelli, Guy Cohen, Geert Jan Olsder, Jean-Pierre Quadrat, "Synchronization and Linearity (online version)", Wiley, 1992, ISBN 0-471-93609-X* Golan, Jonathan S., "Semirings and their applications".
* Алгебра* François Baccelli, Guy Cohen, Geert Jan Olsder, Jean-Pierre Quadrat, "Synchronization and Linearity (online version)", Wiley, 1992, ISBN 0-471-93609-X* Golan, Jonathan S., "Semirings and their applications".