Cavarzere, V., G. P. Moraes, J. J. Roper, L. F. Silveira, and R. J. Donatelli. “ Recommendations for Monitoring Avian Populations With Point Counts: A Case Study in Southeastern Brazil ”. Papéis Avulsos De Zoologia, vol. 53, no. 32, Jan. 2013, pp. 439-4, doi:10.1590/S0031-10492013003200001.