J. Behrendt, M. Funk, and O. Korn. Collective agency and cooperation in natural and artificial systems : explanation, implementation and simulation, 122, page 109-130. Cham, Springer, (2015)
T. Poljansek. Collective agency and cooperation in natural and artificial systems : explanation, implementation and simulation, 122, page 185-203. Cham, Springer, (2015)