1. Ahmad S, Garg MO, Sanjrani MA, Singh M (2009) A phyto-pharmacological overview on Adhatoda zeylanica Medic. Syn. A. vasica (Linn.). Nees Nat Prod Radiance 8(5):549–554
2. Bag A, Bag A (2020) Treatment of COVID-19 patients: Justicia adhatoda leaves extract is a strong remedy for COVID-19 – Case report analysis and docking based study. ChemRxiv. Cambridge Open Engage, Cambridge
3. Banerjee JN, Lewis JJ, Sharp GWG (1954) Preliminary notes on alkaloids of aspidosperma. J Pharm Pharmacol 6(1):660–662
4. Baral PK, Roy S, Sultana S (2018) A review article on Adhatoda vasicanees: a potential source of bioactive compounds. Int J Dev Res 8(11):23874–23882
5. Bashir S, Janbaz KH, Jabeen Q et al (2006) Studies on spasmogenic and spasmolytic activities of Calendula officinalis flowers. Phytother Res 20(10):906–910