Sruthi R., Biju C. R., Jyotisree G., Amita S. Menon, Ayswarya K. and Babu G. (2020) “Formulation, Evaluation and HPTLC Analysis of Topical Ointment Containing Calendula officinalis and Echinacae purpurae Mother Tinctures”, International Journal for Research in Applied Sciences and Biotechnology, 7(6), pp. 78–84. Available at: https://ijrasb.com/index.php/ijrasb/article/view/299 (Accessed: 16 July 2024).