TATAPUDI, Hemant Kumar; BAIRAM, Ravinder; VANAJA , Kassireddy; JABEEN, Mohammed Rukkiya; BAITHI, Ankitha; SOWMYA, Yata. An optimized Box-Behnken design RP-HPLC method for the quantification of Umiclinidinium Bromide and Vilanterol Trifenate in inhalation powder. Drug Analytical Research, Porto Alegre, v. 8, n. 1, p. 23–32, 2026. DOI: 10.22456/2527-2616.138200. Disponível em: https://seer.ufrgs.br/index.php/dar/article/view/138200. Acesso em: 14 sep. 2026.