[1]
P. I. Balogh and Z. Erő, “The Metroline No. 4 in Budapest, the urban development and the open spaces”, 4D, no. 5, pp. 48–55, Feb. 2007, Accessed: Mar. 20, 2026. [Online]. Available: https://journal.uni-mate.hu/index.php/4D/article/view/5919