Extractive method development and validation of tulobuterol in api and its pharmaceutical dosage forms by spectrophotometry. International Journal of Advances in Pharmaceutical Analysis, [S. l.], v. 3, n. 1, p. 20–23, 2013. DOI: 10.7439/ijapa.v3i1.39. Disponível em: https://ssjournals.co.in/index.php/ijapa/article/view/1365. Acesso em: 26 apr. 2026.