CHRÍBIK, Andrej; POLÓNI, Marián; LACH, Ján; RAGAN, Branislav. THE EFFECT OF ADDING HYDROGEN ON THE PERFORMANCE AND THE CYCLIC VARIABILITY OF A SPARK IGNITION ENGINE POWERED BY NATURAL GAS. Acta Polytechnica, Prague, Czech Republic, v. 54, n. 1, p. 10–14, 2014. DOI: 10.14311/AP.2014.54.0010. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/2041. Acesso em: 14 mar. 2025.