@article{Wellings2006,
author = {Wellings, K. and Collumbien, M. and Slaymaker, E. and Singh, S. and Hodges, Z. and Patel, D. and Bajos, N.},
title= {Sexual behaviour in context: a global perspective},
year = {2006},
doi = {10.1016/S0140-6736(06)69479-8},
journal = {Lancet},
volume = {368},
number = {9548},
pages = {1706--1728},
}