MLA

Assi, et al. Numerical Semigroups and Applications. Springer International Publishing, 2020.

APA

Assi, A.Assi, A., D'Anna, M., & García-Sánchez, P. A. (2020). Numerical Semigroups and Applications. Springer International Publishing.

Chicago

Assi, Abdallah Assi, Marco D'Anna, and Pedro A García-Sánchez. Numerical Semigroups and Applications. : Springer International Publishing, 2020.