Onur Atan Saeed Ghoorchian Setareh Maghsudi Mihaela van der Schaar Data-Driven Online Recommender Systems With Costly Information Acquisition. 235-245 2023 January - February 16 IEEE Trans. Serv. Comput. 1 https://doi.org/10.1109/TSC.2021.3113002 db/journals/tsc/tsc16.html#AtanGMS23