Finite dihedral groups and D. G. near rings I J. J. Malone, C. G. Lyons (1972) Compositio Mathematica
Finitely generated commutative division semirings Jaroslav Ježek, Tomáš Kepka (2010) Acta Universitatis Carolinae. Mathematica et Physica
Flat semimodules. Al-Thani, Huda Mohammed J. (2004) International Journal of Mathematics and Mathematical Sciences
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