Saifudin, Akhmad. “The Effect of Additional Ethanol Steam Temperature Variations on Pertalite Fuel Use on Performance and Efficiency of 4 Stroke Motorcycles: Pengaruh Variasi Temperatur Uap Etanol Tambahan Pada Penggunaan Bahan Bakar Pertalite Terhadap Performa Dan Efisiensi Sepeda Motor 4 Langkah”. Procedia of Engineering and Life Science, vol. 1, no. 2, July 2021, doi:10.21070/pels.v1i2.1005.