Abo-EL-Sooud, K., G. A. Swielim, Y. R. Wally, and S. M. EL-Gammal,  "Comparative biliary and serum kinetics of doxycycline after oral and intramuscular routes with special reference to its unique entero-hepatic circulation in turkeys",  Wulfenia Journal, vol. 23, issue 9, pp. 206-219, 2016.