R. F. Abbas, 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, pp. 50–54, Jul. 2017, doi: 10.23851/mjs.v27i5.167.