1. Bradycardia in response to threat;Belkin;Am. Zool.,1968
2. Changes in heart rate and respiratory frequency during natural behaviour of ducks, with particular reference to diving;Butler;J. exp. Biol.,1979
3. ‘Emotional’ bradycardia: a telemetry study on incubating Willow grouse (Lagopus lagopus);Gabrielsen;Acta physiol. scand.,1977
4. Radiotelemetry of heart rates from free ranging gulls;Kanwisher;Auk,1978
5. A telemetry system for recording heart rates of unrestrained game birds;Morrow;J. Wildl. Mngmt.,1976