Khajuria, Arun Kumar, and NS Bisht. “Indirect in Vitro Regeneration of Viola Canescens Wall. Ex, Roxb. By Using Leaf Calli”. Plant Tissue Culture and Biotechnology, vol. 28, no. 2, Dec. 2018, pp. 215-22, doi:10.3329/ptcb.v28i2.39680.