Dhiman, M., V. Sharma, and S. Moitra. “Somatic Embryogenesis and Plant Regeneration in Ephedra Foliata (Boiss.); A Non Coniferous Gymnosperm”. Plant Tissue Culture and Biotechnology, vol. 20, no. 2, Jan. 2011, pp. 133-4, doi:10.3329/ptcb.v20i2.6893.