Siegfried Rüger DDR Verkher 8 1982 3p.



« https://ust.inc/news/innovative-public-transport-technologies-trends-prospects
« https://metropolitiques.eu/Urban-Public-Transit-A-Choice-Between-Two-Models.html
« https://www.mdpi.com/2032-6653/16/9/482
« https://link.springer.com/article/10.1007/s44282-025-00312-3
« https://www.eolss.net/sample-chapters/C05/E6-40-02-02.pdf
