Moscovice, L. R., Surbeck, M., Fruth, B., Hohmann, G., Jaeggi, A., & Deschner, T. (2019). The cooperative sex: Sexual interactions among female bonobos are linked to increases in oxytocin, proximity and coalitions. Hormones and Behavior, 116: 104581. doi:10.1016/j.yhbeh.2019.104581.