@article{Zaba2004,
author = {Zaba, B. and Pisani, E. and Slaymaker, E. and Boerma, J.T.},
title= {Age at first sex: Understanding recent trends in African demographic surveys},
year = {2004},
doi = {10.1136/sti.2004.012674},
journal = {Sexually Transmitted Infections},
volume = {80},
number = {suppl 2},
pages = {ii28--ii35},
}