Voll, J.; Gaiga, L.; Pigatto, J. A. T.; Teixeira, F. dos S. Atlantoaxial Instability Secondary to Agenesis of the Odontoid Process of the Axis Without Rupture of the Dorsal Atlantoaxial Ligament in Dog. Acta Scientiae Vet. 2018, 33, 201-205.