1. Blank, S., Seiter, C. and Bruce, P.: 2001, Resampling Stats in Excel, Resampling Stats Inc., Arlington, VA.
2. Böhning-Gaese, K.: 1997, ‘Determinants of avian species richness at different scales’, J. Biogeogr. 24, 49–60.
3. Bolger, D. T., Scott, T. A. and Rotenberry, J. T.: 1997, ‘Breeding bird abundance in an urbanizing landscape in coastal southern California’, Conserv. Biol. 11, 406–421.
4. Brennan, S. P.: 2004, ‘Relationship of bird abundances and landscape characteristics at multiple scales’, M.S. Thesis, University of Oklahoma, Norman OK.
5. Certain, D. L.: 2000, ‘A multiscale analysis of nest-site choice, nest success, and population abundance in the scissor-tailed flycatcher’, Ph.D. Dissertation, University of Oklahoma, Norman, OK.