参考文献:
O'Donnell C P, King E D, Schwartz A R, et al. Relationship between blood pressure and airway obstruction during sleep in the dog[J]. Journal of Applied Physiology, 1994, 77(4): 1819-1828.
Adams G J, Johnson K G. Sleep-wake cycles and other night-time behaviours of the domestic dog Canis familiaris[J]. Applied Animal Behaviour Science, 1993, 36(2-3): 233-248.