Sexual Selection on Plumage and Behavior in an Avian Hybrid Zone: Experimental Tests of Male-Male Interactionsv. 55No. 71443–1451
McDonald, David B., Clay, Robert P., Brumfield, Robb T., and Braun, Michael J. 2001. "Sexual Selection on Plumage and Behavior in an Avian Hybrid Zone: Experimental Tests of Male-Male Interactions." Evolution, 55, (7) 1443–1451.