Darvinder Kumar , trans. “A Queueing System With Catastrophe, Feedback, State Dependent Service and Environmental Change ”. Cuestiones de Fisioterapia 53, no. 03 (October 15, 2024): 2036–2047. Accessed September 22, 2025. https://cuestionesdefisioterapia.com/index.php/es/article/view/3073.