Differentiation of Five Commercially Available Triphala churnas of an Ayurvedic Formulation by Elemental Fingerprint, Kantamreddi, Venkata Siva Satya, V. Veni Thirumala, Malasani Murali Krishna, and Simhachalam Boddana , Pharmacognosy Journal, November 2016, Volume 9, Issue 1, p.117-122., (2017)