Ziad, Ines, 		Laxmi, P. Vijaya, 		Bhavani, E. Girija, 		Bouchentouf, Amina, AND 		Majid, Shakir.
" A Matrix Geometric Solution of a Multi-Server Queue With Waiting Servers and Customers’ Impatience Under Variant Working Vacation and Vacation Interruption" <em>Yugoslav Journal of Operations Research</em> [Online], Volume 33 Number 3 (12 February 2023)