Ümit Girgel, A. Çokkızgın, M. Çölkesen, and H. Çokkızgın, “Determination of the Relationship Between the Phenological Characteristics of F1 and F2 Hybrid Pea Varieties by Correlation Factor Analysis”, Turkish JAF Sci.Tech., vol. 6, no. 6, pp. 689–692, Jun. 2018.