Search for: [References = "Frei, A., Kuhnimhof, T., \& Axhausen, K.W. \(2009\). Long distance travel in Europe today\: Experiences with a new survey. Pobrane z\: http\:\/\/citeseerx.ist.psu.edu\/viewdoc\/download\? doi=10.1.1.624.4140\&rep=rep1\&type=pdf \(14.01.2021\)."]