Using radiotelemetry to monitor cardiac response of free-living tule greater white-fronted geese (Anser albifrons elgasi) to human disturbance - Ackerman, Joshua T.; Takekawa, John; Kruse, K.L.; Orthmeyer, D.L.; Yee, J.L.; Ely, Craig; Ward, David; Bollinger, Karen; Mulcahy, Daniel (The Wilson Bulletin, 2004)