@TechReport{CEPII:2009-21,
author={Julien Martin},
title={Spatial Price Discrimination in International Markets},
year=2009,
month=September,
institution={CEPII},
type={Working Papers},
url={https://www.cepii.fr/CEPII/en/publications/wp/abstract.asp?NoDoc=1406},
number={2009-21},
}