@inbook{Anderson_2015,
title={The Advertising-Financed Business Model in Two-Sided Media Markets},
ISSN={2213-6630},
url={http://dx.doi.org/10.1016/b978-0-444-62721-6.00002-0},
DOI={10.1016/b978-0-444-62721-6.00002-0},
booktitle={Handbook of Media Economics},
publisher={Elsevier},
author={Anderson,
Simon P. and Jullien,
Bruno},
year={2015},
pages={41–90} }