Lekkoksung N, Jampachon P. IDEMPOTENT ELEMENTS OF PRE-GENERALIZED HYPERSUBSTITUTIONS OF TYPE (m, n). IJPAM [Internet]. 2016 Jul. 29 [cited 2026 Aug. 16];36:827-42. Available from: https://journals.uniurb.it/index.php/ijpam/article/view/6481