Hendricks, J. C.; Kline, L. R.; Kovalski, R. J.; O'Brien, J. A.; Morrison, A. R.; Pack, A. I. (1 October 1987). "The English bulldog: a natural model of sleep-disordered breathing". Journal of Applied Physiology. 63 (4). American Physiological Society: 1344–1350. doi:10.1152/jappl.1987.63.4.1344. ISSN8750-7587. PMID3693167.
Gruenheid, Michaela; Aarnes, Turi K.; McLoughlin, Mary A.; Simpson, Elaine M.; Mathys, Dimitria A.; Mollenkopf, Dixie F.; Wittum, Thomas E. (1 August 2018). "Risk of anesthesia-related complications in brachycephalic dogs". Journal of the American Veterinary Medical Association. 253 (3). American Veterinary Medical Association (AVMA): 301–306. doi:10.2460/javma.253.3.301. ISSN0003-1488. PMID30020004.
Evans, Katy M.; Adams, Vicki J. (2010). "Proportion of litters of purebred dogs born by caesarean section". Journal of Small Animal Practice. 51 (2): 113–8. doi:10.1111/j.1748-5827.2009.00902.x. PMID20136998.
Hendricks, J. C.; Kline, L. R.; Kovalski, R. J.; O'Brien, J. A.; Morrison, A. R.; Pack, A. I. (1 October 1987). "The English bulldog: a natural model of sleep-disordered breathing". Journal of Applied Physiology. 63 (4). American Physiological Society: 1344–1350. doi:10.1152/jappl.1987.63.4.1344. ISSN8750-7587. PMID3693167.
Gruenheid, Michaela; Aarnes, Turi K.; McLoughlin, Mary A.; Simpson, Elaine M.; Mathys, Dimitria A.; Mollenkopf, Dixie F.; Wittum, Thomas E. (1 August 2018). "Risk of anesthesia-related complications in brachycephalic dogs". Journal of the American Veterinary Medical Association. 253 (3). American Veterinary Medical Association (AVMA): 301–306. doi:10.2460/javma.253.3.301. ISSN0003-1488. PMID30020004.
Evans, Katy M.; Adams, Vicki J. (2010). "Proportion of litters of purebred dogs born by caesarean section". Journal of Small Animal Practice. 51 (2): 113–8. doi:10.1111/j.1748-5827.2009.00902.x. PMID20136998.
Hendricks, J. C.; Kline, L. R.; Kovalski, R. J.; O'Brien, J. A.; Morrison, A. R.; Pack, A. I. (1 October 1987). "The English bulldog: a natural model of sleep-disordered breathing". Journal of Applied Physiology. 63 (4). American Physiological Society: 1344–1350. doi:10.1152/jappl.1987.63.4.1344. ISSN8750-7587. PMID3693167.
Gruenheid, Michaela; Aarnes, Turi K.; McLoughlin, Mary A.; Simpson, Elaine M.; Mathys, Dimitria A.; Mollenkopf, Dixie F.; Wittum, Thomas E. (1 August 2018). "Risk of anesthesia-related complications in brachycephalic dogs". Journal of the American Veterinary Medical Association. 253 (3). American Veterinary Medical Association (AVMA): 301–306. doi:10.2460/javma.253.3.301. ISSN0003-1488. PMID30020004.