Grau J, Botta R, Schaerer CE. Optimal control of fractional punishment in optional public goods game. Trends Comput. Appl. Math. [Internet]. 2024 Nov. 28 [cited 2025 Mar. 10];25(1):e01737. Available from: https://tema.sbmac.emnuvens.com.br/tema/article/view/1737