@article{Singh2010,
author = {Singh, N. and Pripp, A.H. and Brekke, T. and Stray-Pedersen, B.},
title= {Different sex ratios of children born to Indian and Pakistani immigrants in Norway},
year = {2010},
doi = {10.1186/1471-2393-10-40},
volume = {10},
number = {1},
pages = {40},
}