Development of alternative ship propulsion in terms of exhaust emissionsJarosław Markowski, Jacek Pielecha, Remigiusz Jasiński, Tomasz Kniaziewicz and Paweł WirkowskiE3S Web Conf., 10 (2016) 00140DOI: https://doi.org/10.1051/e3sconf/20161000140