Lueangwitchajaroen, Pitiwat, & Ekkachai Laysirikul. " The Formula of the Frobenius Number for a Numerical Semigroup with Embedding Dimension Three respect to a Partial Order Relation." Naresuan University Journal: Science and Technology (NUJST) [Online], 31.2 (2023): 33-41. Web. 3 Jan. 2026