1) S. Raviteja, G.N. Kumar, Effect of hydrogen addition on the performance and emission parameters of an SI engine fueled with butanol blends at stoichiometric conditions, International Journal of Hydrogen Energy, Volume 40, Issue 30, 10 August 2015, Pages 9563-9569, ISSN 0360-3199, http://dx.doi.org/10.1016/j.ijhydene.2015.05.171.