Lauks, G., and J. Jeļinskis. “Metamodelling of Queuing Systems Using Fuzzy Graphs”. Elektronika ir Elektrotechnika 92, no. 4 (April 19, 2009): 61–54. Accessed January 23, 2026. https://eejournal.ktu.lt/index.php/elt/article/view/10246.