1. Bird census techniques;Bibby,1992
2. Land-use and avian species diversity along an urban gradient;Blair;Ecological Applications,1996
3. Statistics for spatial data;Cressie,1993
4. Distribution and habitat relationship of the Phainopepla;Crouch;Auk,1943
5. DeGraaf, R. M., & Wentworth, J. M. (1981). Urban bird communities and habitats in New England. Transactions of the 46th North American wildlife and natural resources conference (pp. 396–412), Washington, DC.