Abbas, R. F., A. A. Wheeb, and A. A. Jasim. “Spectrophotometric Determination of Doxycycline Hyclate in Pure and Capsule Using Diazotization Reaction”. Al-Mustansiriyah Journal of Science, vol. 27, no. 5, July 2017, pp. 50-54, doi:10.23851/mjs.v27i5.167.