@article{journal,
author = {Royle, J. A.},
title = {Generalized estimators of avian abundance from count survey data},
year = {2004},
volume = {27.1},
pages = {375--386},
journal = {Animal Biodiversity and Conservation},
keywords = {Abundance estimation, Avian point counts, Detection probability, Hierarchical models, Metapopulation models, Population size}
}