RYMARZ, Joanna - BORUCKA, Anna - NIEWCZAS, Andrzej. Evaluation of Impact of the Operational and Technical Factors on Downtime of Municipal Buses Based on a Linear Regression Model. In Communications : Scientific Letters of the University of Zilina. - Žilina : EDIS, University Publishing House, University of Žilina, 2021. ISSN 1335-4205, 2021, vol. 23, no. 4, pp. A241-A247.