1.
Somsri B, Pipattanajinda N. The Number of Endomorphism of Barbell Graphs. J. Sci. Technol. CRRU [internet]. 2025 Dec. 17 [cited 2026 Sep. 13];4(2):61-70. available from: https://li01.tci-thaijo.org/index.php/jstcrru/article/view/267592