@TechReport{CEPII:2012-01,
author={Colette Herzog and Deniz Ünal},
title={Panorama de la spécialisation européenne},
year=2012,
month=January,
institution={CEPII},
type={Data},
url={https://www.cepii.fr/CEPII/en/publications/panorama/abstract.asp?NoDoc=3546},
number={2012-01},
}