Sepehri , A. ., Rouhi, H. R., & Sefidkhani, L. . (2015). Evaluation of several methods for breakind dormancy of bitter vetch seeds (Vicia Ervilia L.). Plant Breeding and Seed Science, 71, 57–66. Retrieved from http://ojs.ihar.edu.pl/index.php/pbss/article/view/265