TY - BOOK AU - Drapik, Sławomir AU - Kaczmarczyk, Adrian AU - Prusak, Janusz AU - Woszczyna, Bartosz AU - Markowski, Paweł PY - 2016 TI - The character of load variability of tram traction substations that supplie lines with different specificity of traffic T2 - SP - EP - VL - ER -