[1] Rivera-Milán, F.F., C.R. Ruiz, J.A. Cruz, M. Vázquez, and A.J. Martínez. 2003. Population monitoring of Plain Pigeons in Puerto Rico. Wilson Bulletin 115: 45–51.
[2] Rivera-Milan, F.F. 2005. Monitoring of pigeon and dove populations on Puerto Rico and Territorial Islands (1986-2005). U.S. Fish and Wildlife Service, unpublished manuscript, October 3, 2005.