@article{journal,
author = {MacKenzie, D. I. and Nichols, J. D.},
title = {Occupancy as a surrogate for abundance estimation},
year = {2004},
volume = {27.1},
pages = {461--467},
journal = {Animal Biodiversity and Conservation},
keywords = {Occupancy, Species distribution, Abundance, Metapopulation, Monitoring}
}