Zhu, Jing, Sabre Kais, Alán Aspuru-Guzik, Sam Rodriques, Ben Brock, and Peter J. Love. "Multipartite Quantum Entanglement Evolution in Photosynthetic Complexes." The Journal of Chemical Physics 137, no. 7 (August 21, 2012): 074112. doi:10.1063/1.4742333.