Zadeh, Mir Naser Seiedi, Raouf Seyed Sharifi, Mohammad Zaefi. 2009. “Evaluation of Yield and Growth Indices of Canola (Brassica Napus L.) Cultivars in Different Nitrogen Fertililization Levels”. Journal of Phytology 1 (6). https://updatepublishing.com/journal/index.php/jp/article/view/2062.