Hayat, Shamsul, et al. “Proline Enhances Antioxidative Enzyme Activity, Photosynthesis and Yield of Cicer Arietinum L. Exposed to Cadmium Stress”. Acta Botanica Croatica, vol. 72, no. 2, Oct. 2013, https://ojs3.abc.botanic.hr/index.php/abc/article/view/703.