Effect of addition of coal sludge to polymeric material on thermal effects in analysis by TG/DTG/DSC methodsAgnieszka Kijo-Kleczkowska, Adam Gnatowski, Magdalena Szumera, Henryk Otwinowski, Dariusz Kwiatkowski and Łukasz SucheckiE3S Web Conf., 154 (2020) 03002DOI: https://doi.org/10.1051/e3sconf/202015403002