Rahman, Md Mahbubur, et al. “Somatic Embryogenesis and Subsequent Plant Regeneration from Zygotic Embryo Derived Callus of Rubber (Hevea Brasiliensis Muell. Arg)”. Plant Tissue Culture and Biotechnology, vol. 27, no. 1, Dec. 2017, pp. 51-61, doi:10.3329/ptcb.v27i1.35012.