1. Barucci, V., Dobbs, D.E., Fontana, M.: Maximality properties in numerical semigroups and applications to one-dimensional analytically irreducible local domain. Mem. Am. Math. Soc. 125(598) (1997)
2. Barucci, V., Fröberg, R.: One-dimensional almost Gorenstein rings. J. Algebra 188, 418–442 (1997)
3. Bruns, W., Herzog, J.: Cohen–Macaulay Rings, Revised edn. Cambridge University Press, Cambridge (1998)
4. Chau, T.D.M., Goto, S., Kumashiro, S., Matsuoka, N.: Sally modules of canonical ideals in dimension one and 2-AGL rings. arXiv:1704.00997v1
5. Delgado, M., García-Sánchez, P.A., Morais, J.: “NumericalSgps”—a GAP package, Version 1.1.5. http://www.gap-system.org/Packages/numericalsgps.html . Accessed 25 Sept 2017