Maftuchah, A. . Zainudin, . B. . Heliyanto, H. . Sudarmo, M. . Mel, and . L. K. . Kuan. “Combining Ability in Jatropha Curcas L. Genotypes: Combining Ability in Jatropha Curcas L. Genotypes”. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences, vol. 54, no. 3, Sept. 2017, pp. 259-61, http://ppaspk.org/index.php/PPAS-B/article/view/414.