Nowak, Renata, and Hubert Rabant. 2016. “Ocena Zmian W Transporcie Kolejowym pasażerskim W województwie Wielkopolskim = Assessment of Changes in Rail Passenger in the Region Wielkopolska”. Journal of Education, Health and Sport 6 (12):552-63. https://apcz.umk.pl/JEHS/article/view/4099.