Wan Ahmad, W.N.A. , Sufahani, S.F., Mohamad, M.A.H., Rusiman, M.S., Md Maarof, M.Z. , Kamarudin, M.A.I. , Ismoen, M. and Lee, K.H. 2024. Modified Shooting with Discretization Validation for Non-Standard Optimal Control Problem: Case Study for Four-Stage Royalty Payment Problem. Journal of Advanced Research in Applied Sciences and Engineering Technology. (Nov. 2024), 296–311. DOI:https://doi.org/10.37934/araset.59.2.296311.