Yaw Control of a 3-Axle Truck Semi-Trailer using Steerable-Wheel Optimized with Gravitational Search Algorithm. - Muhamad Afiq Mohd Yussof; Noor Hafizah Amer; Zulkiffli Abdul Kadir; Khisbullah Hudha; Mohd Sabirin Rahmat; Mohamad Hafiz Harun (ICSET, 2020)