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Wagh, Dipmala Dilip; Deshmukh, Vishakha Vijay; Vassa, Swetal Prashant; Jain, Hemant Kumar . (2013). DEVELOPMENT AND VALIDATION OF FIRST ORDER DERIVATIVE UV SPECTROPHOTOMETRIC METHOD FOR SIMULTANEOUS ESTIMATION OF PROPRANOLOL HYDROCHLORIDE AND FLUNARIZINE DIHYDROCHLORIDE IN BULK AND COMBINED DOSAGE FORM. INTERNATIONAL RESEARCH JOURNAL OF PHARMACY, 4(6), 174–178. doi:10.7897/2230-8407.04639 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research