@article{Gage1997,
author = {Gage, J.A. and Sommerfelt, E. and Paini, A.L.},
title= {Household Structure and Childhood Immunization in Niger and Nigeria},
year = {1997},
doi = {10.2307/2061706},
journal = {Demography},
volume = {34},
number = {2},
pages = {295--309},
}