et. al., Ghulam Hazrat Aimal Ras,. “Asymptotic Formulas for Weight Numbers of the Boundary Problem Differential Operator on a Star-Shaped Graph”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 13 (July 14, 2021): 2184–2192. Accessed July 15, 2024. https://www.turcomat.org/index.php/turkbilmat/article/view/8901.