Sharifi, Mohammad Sedghi, Amir Heydari, Abdolghayoum Gholipouri, Raouf Seyed. 2009. “Modeling Growth and Yield of Sunflower (Helianthus Annus L.)”. Recent Research in Science and Technology 1 (5). https://updatepublishing.com/journal/index.php/rrst/article/view/322.