W. W. Wójcik, A. Kotyra, M. Duk, and T. Golec, “The Fibre-Optic System Detecting the Burning Mazout in Power Boilers”, ELEKTRON ELEKTROTECH, vol. 49, no. 7, Oct. 2003, Accessed: Jan. 22, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/11105