Balsys, K., D. Eidukas, A. Marma, A. Valinevičius, and M. Žilys. “Systems of Transport Route Development”. Elektronika Ir Elektrotechnika, vol. 75, no. 3, Mar. 2007, pp. 17-22, https://eejournal.ktu.lt/index.php/elt/article/view/10385.