Physical Properties of Biodiesel-Diesel Blends with Butyl Levulinate Additive and their Emission Characteristics from Diesel Engine. - Samion, Muhammad Alif; Zainol, Muzakkir Mohammad; Azlan, Muhammad A'qil; Asmadi, Mohd; Hassan, Abdull Hafidz; Baharudin, Luqmanulhakim; Saad, Idris (CET Journal - Chemical Engineering Transactions, 2023)