Yasir F. Muhsin, Shakir M. Alwan, and Ayad Kareem Khan. “ Synthesis of Aromatic Amino Acids Linked to Cephalexin”. Al Mustansiriyah Journal of Pharmaceutical Sciences, vol. 21, no. 3, Apr. 2022, pp. 25-34, doi:10.32947/ajps.v21i3.794.