Đọc thêm Nửa vành

Golan, Jonathan S. (2003). Semirings and Affine Equations over Them. Springer Science & Business Media. ISBN 978-1-4020-1358-4. Zbl 1042.16038.
Gondran, Michel; Minoux, Michel (2008). Graphs, Dioids and Semirings: New Models and Algorithms. Operations Research/Computer Science Interfaces Series. 41. Dordrecht: Springer Science & Business Media. ISBN 978-0-387-75450-5. Zbl 1201.16038.
Grillet, Mireille P. (1970). “Green's relations in a semiring”. Port. Math. 29: 181–195. Zbl 0227.16029.
Gunawardena, Jeremy (1998). “An introduction to idempotency”. Trong Gunawardena, Jeremy (biên tập). Idempotency. Based on a workshop, Bristol, UK, October 3–7, 1994 (PDF). Cambridge: Cambridge University Press. tr. 1–49. Zbl 0898.16032.
Jipsen, P. (2004). “From semirings to residuated Kleene lattices”. Studia Logica. 76 (2): 291–303. doi:10.1023/B:STUD.0000032089.54776.63. S2CID 9946523. Zbl 1045.03049.
Steven Dolan (2013) Fun with Semirings, doi:10.1145/2500365.2500613

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