R. Toman, M. Polóni, and A. Chríbik, “PRELIMINARY STUDY ON COMBUSTION AND OVERALL PARAMETERS OF SYNGAS FUEL MIXTURES FOR SPARK IGNITION COMBUSTION ENGINE”, Acta Polytech, vol. 57, no. 1, pp. 38–48, Feb. 2017, doi: 10.14311/AP.2017.57.0038.