@article{Hoem2011,
author = "Hoem, J. M. and Muresan, C.",
title = "An extension of the conventional TFR",
year = 2011,
journal = "European Journal of Population",
volume = 27,
pages = "389-402",
url = "http://www.demogr.mpg.de/en/projects_publications/publications_1904/journal_articles/an_extension_of_the_conventional_tfr_4240.htm"
}