Zee, P. C., Mendes-Soares, H., Yu, Y.-T.-N., Kraemer, S. A., Keller, H., Ossowski, S., et al. (2014). A SHIFT FROM MAGNITUDE TO SIGN EPISTASIS DURING ADAPTIVE EVOLUTION OF A BACTERIAL SOCIAL TRAIT. EVOLUTION, 68(9), 2701-2708. doi:10.1111/evo.12467.