Thermovolumetric investigations of steam gasification of coals and their charsStanisław Porada, Grzegorz Czerski, Przemysław Grzywacz, Tadeusz Dziok and Dorota MakowskaE3S Web Conf., 14 (2017) 02005DOI: https://doi.org/10.1051/e3sconf/20171402005