AGARWAL, SHAMBHU, et al. “N-ASTHEAL ®, A HERBAL FORMULA FOR THE TREATMENT OF MILD ASTHMA: AN OPEN, SINGLE CENTRIC, NON- COMPARATIVE PILOT STUDY FOR 3 WEEKS”. Asian Journal of Pharmaceutical and Clinical Research, vol. 7, no. 4, Sept. 2014, pp. 3-6, https://www.journals.innovareacademics.in/index.php/ajpcr/article/view/1507.