Showkat, P., Zaidi, Y., Asghar, S. and Jamaluddin, S. 2011. In vitro Propagation and Callus Formation of Bacopa monnieri (L.) Penn. Plant Tissue Culture and Biotechnology. 20, 2 (Jan. 2011), 119–125. DOI:https://doi.org/10.3329/ptcb.v20i2.6890.