Oćwieja, D., Markowski, P., Prusak, J., Woszczyna, B. (2018). 
	The range of load variability of rectifier units with a concentrated disposition of tram substations as exemplified by a real tram line. Czasopismo Techniczne, 2018, 133-148. doi: https://doi.org/10.4467/2353737XCT.18.168.9424