@article{Castiglioni2001,
author = {Castiglioni, M. and Dalla Zuanna, G. and Loghi, M.},
title= {Planned and unplanned births and conceptions in Italy, 1970–1995},
year = {2001},
doi = {10.1023/A:1011810602552},
volume = {17},
number = {3},
pages = {207--233},
}