“Singularly Perturbed Markov Models of Recovery Processes of Human–Machine–Environmental Systems With a Protection Subsystem”. Visnyk of Vinnytsia Politechnical Institute, no. 4 (October 2, 2026): 108–118. Accessed October 10, 2026. https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/3576.