Izvolt, Libor, Janka Sestakova, and Michal Smalo. 2016. “Analysis of Results of Monitoring and Prediction of Quality Development of Ballasted and Ballastless Track Superstructure and Its Transition Areas”. Communications - Scientific Letters of the University of Zilina 18 (4), 19-29. http://journals.uniza.sk/index.php/communications/article/view/284.