Revalorisation of the Szewalski’s concept of the law of varying the last-stage blade retraction in a gas-steam turbinePaweł Ziółkowski, Stanisław Głuch, Tomasz Kowalczyk and Janusz BadurE3S Web Conf., 323 (2021) 00034DOI: https://doi.org/10.1051/e3sconf/202132300034