Berk, James L.; Levy, Matthew N. (1977). "Profound Reflex Bradycardia Produced by Transient Hypoxia or Hypercapnia in Man". European Surgical Research. 9 (2): 75–84. doi:10.1159/000127928. PMID852474.
Berk, James L.; Levy, Matthew N. (1977). "Profound Reflex Bradycardia Produced by Transient Hypoxia or Hypercapnia in Man". European Surgical Research. 9 (2): 75–84. doi:10.1159/000127928. PMID852474.