J. Latakas, S. Pukalskas, A. Rimkus, M. Melaika, R. Vėgneris, and P. Stravinskas, “The influence of hydrogen gas on the measures of efficiency of diesel internal combustion engine”, MLA, vol. 6, no. 5, pp. 558–563, Dec. 2014, doi: 10.3846/mla.2014.700.