Elias Khudhur Hussein, Ibrahim Y .Alrawy, Barra D. Al-watar, Eman H. Lazim. “Comparative Study Between Ultrasound Linear Probe and Curved Probe in Pregnancy Diagnosis of Rabbits”. Revista Electronica De Veterinaria, Aug. 2022, pp. 479 -84, https://veterinaria.org/index.php/REDVET/article/view/246.