Antioxidant Activity, Total Phenolic and Flavonoid Content of Berberis aristata DC. and Berberis thomsoniana C.K. Schneid. from Sagarmatha National Park, Nepal, Bhatt, Lok Ranjan, Wagle Bina, Adhikari Minu, Bhusal Santoshi, Giri Anjana, and Bhattarai Shandesh , Pharmacognosy Journal, November 2018, Volume 10, Issue 6s, p.s167-s171, (2018)