Kristensen, Jens Peder, og Morten Falch. «Telekommunikations Indflydelse På Persontransport». Proceedings from the Annual Transport Conference at Aalborg University 4, no. 1 (desember 31, 1997). åpnet juli 3, 2024. https://journals.aau.dk/index.php/td/article/view/4134.