Interspecific aggression among parapatric and sympatric songbirds on a tropical elevational gradientDOI: info:10.1093/beheco/ary194v. 30No. 2Oxford University Press541–547
Boyce, Andy J. and Martin, Thomas E. 2019. "Interspecific aggression among parapatric and sympatric songbirds on a tropical elevational gradient." Behavioral Ecology, 30, (2) 541–547. https://doi.org/10.1093/beheco/ary194.