Nuara, Alessandro, Francesco Trovò, Nicola Gatti, and Marcello Restelli. 2018. “A Combinatorial-Bandit Algorithm for the Online Joint Bid/Budget Optimization of Pay-Per-Click Advertising Campaigns”. Proceedings of the AAAI Conference on Artificial Intelligence 32 (1). https://doi.org/10.1609/aaai.v32i1.11888.