@article {164187,
	title = {Validated UPLC method for the determination of guaiphenesin, oxeladin citrate, diphenhydramine, and sodium benzoate in their quaternary mixture used in treatment of cough, in the presence of guaiphenesin-related substance (guaiacol)},
	journal = {Chemical papers},
	volume = {72},
	year = {2018},
	pages = {2247{\textendash}2254},
	author = {Hanan A. Merey and Nesrin K. Ramadan and Sherine S. Diab and Azza A. Moustafa}
}
