Esteban Feuerstein Pablo Ariel Heiber Marcelo Mydlarz Truthful Stochastic and Deterministic Auctions for Sponsored Search. 39-48 2008 LA-WEB http://dx.doi.org/10.1109/LA-WEB.2008.17 conf/la-web/2008 db/conf/la-web/la-web2008.html#FeuersteinHM08