Baracat, Marcela Maria, et al. “Comparative Study of Excipients for Propanolol Hydrochloryde Tablets Prepared by Means of Diferent Techniques”. Semina: Ciências Biológicas E Da Saúde, vol. 22, no. 1, July 2004, pp. 19-24, doi:10.5433/1679-0367.2001v22n1p19.