Dröge, M. J., Boersma, Y. L., van Pouderoyen, G., Vrenken, T. E., Rüggeberg, C. J., Reetz, M. T., Dijkstra, B. W., & Quax, W. J. (2006). Directed evolution of Bacillus subtilis lipase A by use of enantiomeric phosphonate inhibitors: Crystal structures and phage display selection. ChemBioChem, 7, 149-157. doi:10.1002/cbic.200500308.