@inbook{Barber2011,
author = {Barber, J.S. and Kusunoki, Y. and Gatny, H.H.},
title= {Design and implementation of an online weekly journal to study unintended pregnancies},
year = {2011},
booktitle = {Vienna Yearbook of Population Research / Vienna Institute of Demography},
address = {Vienna},
publisher = {Austrian Academy of Sciences},
pages = {327--334},
}