Hydro-Liquefaction of Tile-Like Barzas Coals in the Presence of Some Transition Metal AdditivesIvan Petrov, Konstantin Ushakov, Sergey Sozinov and Alexander BogomolovE3S Web Conf., 105 (2019) 01020DOI: https://doi.org/10.1051/e3sconf/201910501020