Stein, H., Honig, A., Miller, G., Erster, O., Eilenberg, H., Csonka, L. N., Szabados, L., Koncz, C., & Zilberstein, A. (2011). Elevation of free proline and proline-rich protein levels by simultaneous manipulations of proline biosynthesis and degradation in plants. PLANT SCIENCE, 181(2), 140-150. doi:10.1016/j.plantsci.2011.04.013.