Terry, J., Black, B., Grammel, N., Jayakumar, M., Hari, A., Sullivan, R., Santos, L., Perez, R., Horsch, C., Dieffendahl, C., Williams, N., & Lokesh, Y. PettingZoo: Gym for multi-agent reinforcement learning [Computer software]. https://github.com/Farama-Foundation/PettingZoo