« / » https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiGjsLD0b3rAhWJEBQKHfw9CucQFjACegQIBRAB&url=https%3A%2F%2Frepository.tudelft.nl%2Fislandora%2Fobject%2Fuuid%3A70eacb8c-bcbb-4e13-9cce-3a110572ca93%2Fdatastream%2FOBJ%2Fdownload&usg=AOvVaw15pPoSZoskcXUPTiQ9diaW « / » https://link.springer.com/article/10.1007/s12469-015-0114-7 « / » https://www.dub.uu.nl/en/depth/why-bus-made-way-one-single-tram-line « / » https://www.acea.be/uploads/publications/20th_SAG_HR.pdf « / » https://www.caf.net/en/sala-prensa/nota-prensa-detalle.php?e=207 « / » https://wikitravel.org/en/Utrecht « / » https://books.google.fr/books?id=t31gDwAAQBAJ&pg=PA73&lpg=PA73&dq=Thesis+about+comparison+of+Tramways+and+buses+operating+in+Utrecht&source=bl&ots=aNfk4Ul-C5&sig=ACfU3U2aIiESW8MqP92WemJGKMB_MHP4Kw&hl=fr&sa=X&ved=2ahUKEwisqaD0273rAhU08uAKHWwaDOw4PBDoATAIegQICRAB#v=onepage&q=Thesis%20about%20comparison%20of%20Tramways%20and%20buses%20operating%20in%20Utrecht&f=false « / » https://www.railway-technology.com/projects/uithof-tram-line-uithoflijn-utrecht/
