BibTex format
@article{Engen:2010:10.1111/j.1420-9101.2010.01979.x,
author = {Engen, S and Lande, R and Saether, B-E and Gienapp, P},
doi = {10.1111/j.1420-9101.2010.01979.x},
journal = {JOURNAL OF EVOLUTIONARY BIOLOGY},
pages = {1148--1158},
title = {Estimating the ratio of effective to actual size of an age-structured population from individual demographic data},
url = {http://dx.doi.org/10.1111/j.1420-9101.2010.01979.x},
volume = {23},
year = {2010}
}