참고문헌
- K. Ahmadi and A. Madanshekaf, Nakayama's lemma for acts over monoids, Semigroup Forum 91 (2015), no. 2, 321-337. https://doi.org/10.1007/s00233-014-9653-5
- P. Fleury, Hollow modules and local endomorphism rings, Pacific J. Math. 53 (1974), 379-385. http://projecteuclid.org/euclid.pjm/1102911607 https://doi.org/10.2140/pjm.1974.53.379
- M. Harada, On maximal submodules of a finite direct sum of hollow modules. III, Osaka J. Math. 22 (1985), no. 1, 81-98. http://projecteuclid.org/euclid.ojm/1200778037
- J. R. Isbell, Perfect monoids, Semigroup Forum 2 (1971), no. 2, 95-118. https://doi.org/10.1007/BF02572283
- R. Khosravi, M. Ershad, and M. Sedaghatjoo, Strongly flat and condition (P) covers of acts over monoids, Comm. Algebra 38 (2010), no. 12, 4520-4530. https://doi.org/10.1080/00927870903390660
- M. Kilp, Perfect monoids revisited, Semigroup Forum 53 (1996), no. 2, 225-229. https://doi.org/10.1007/BF02574138
- M. Kilp, U. Knauer, and A. V. Mikhalev, Monoids, acts and categories, De Gruyter Expositions in Mathematics, 29, Walter de Gruyter & Co., Berlin, 2000. https://doi.org/10.1515/9783110812909
- M. Mahmoudi and J. Renshaw, On covers of cyclic acts over monoids, Semigroup Forum 77 (2008), no. 2, 325-338. https://doi.org/10.1007/s00233-008-9094-0
- M. Roueentan and M. Sedaghatjoo, On uniform acts over semigroups, Semigroup Forum 97 (2018), no. 2, 229-243. https://doi.org/10.1007/s00233-017-9908-z
- R. Wisbauer, Foundations of module and ring theory, revised and translated from the 1988 German edition, Algebra, Logic and Applications, 3, Gordon and Breach Science Publishers, Philadelphia, PA, 1991.