Joseph Lungu, Lennox Siwale and Edwin Luwaya. Study and Effect of Ignition Timing on the Combustion Characteristics of Gasoline En 91 in a Spark Ignition Engine. NAER-V1 [Internet]. 2021 Jun. 24 [cited 2026 Jun. 4];:104-2. Available from: https://stm.bookpi.org/NAER-V1/article/view/1914