List of Articles Pontryagin maximum principle Open Access Article Abstract Page Full-Text 1 - Three-axis optimal control of satellite attitude based on Ponteryagin maximum principle M. R. Niknam K. Kheiri A. Heydari Open Access Article Abstract Page Full-Text 2 - Stability Analysis and Optimal Control of Vaccination and Treatment of a SIR Epidemiological Deterministic Model with Relapse Sunday Fadugba Temitope Ogunlade Oluwatayo Ogunmiloro