C. A. B. Lorigados and A. C. B. F. Pinto, “Comparison between ultrasound images of the dog brain with and without the calvaria and its correlation with real anatomy”, Braz. J. Vet. Res. Anim. Sci., vol. 50, no. 2, pp. 105–113, Apr. 2013, doi: 10.11606/issn.2318-3659.v50i2p105-113.