M. Kurzawa, A. Filipiak-Szok, T. Czubachowski, and E. Szłyk, “Validation of the doxycycline hydrochloride determination by high-performance liquid chromatography technique”, Curr. Issues Pharm. Med. Sci., vol. 25, no. 3, pp. 266–269, Jul. 2012, doi: 10.12923/j.2084-980X/25.3/a.10.