Bolkovac, Ivan, Marko Horvat, Kristian Jambrošić, and Hrvoje Domitrović. “The Suitability of Internal Combustion Engine Sounds As Artificial Warning Sounds for Electric and Hybrid Vehicles”. Promet - Traffic&Transportation 26, no. 4 (August 4, 2014): 271-280. Accessed March 29, 2024. http://traffic.fpz.hr/index.php/PROMTT/article/view/1453.