Zalar D, Ušpalytė-Vitkūnienė R, Rebolj D, Lep M. A methodological framework for measuring the level of convenience of transport ticketing systems. Transport [Internet]. 2018Dec.5 [cited 2024Nov.13];33(4):1005-16. Available from: https://transport.vgtu.lt/index.php/Transport/article/view/167