Theocharidis, K, Terrovitis, M, Skiadopoulos, S & Karras, P 2022, A Content Recommendation Policy for Gaining Subscribers . in SIGIR 2022-Proceedings of the 45th International ACM SIGIR Conference on Research and Development in Information Retrieval . Association for Computing Machinery, pp. 2501-2506, 45th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2022, Madrid, Spain, 11/07/2022 . https://doi.org/10.1145/3477495.3531885