Intisar A. Shihab and Theia’a N. Al-Sabha , Trans., “Application of Cloud Point Method for Spectrophotometric Determination of Salbutamol Sulphate and Methyldopa”, Pak. J. Anal. Environ. Chem., vol. 21, no. 1, pp. 10 – 18, Jun. 2020, doi: 10.21743/pjaec/2020.06.02.