M. Becker, K. Borchert, M. Hirth, H. Mewes, A. Hotho, and P. Tran-Gia. Proceedings of the 15th International Conference on Knowledge Technologies and Data-driven Business, page 10:1--10:8. New York, NY, USA, ACM, (October 2015)
N. Tahmasebi, and T. Risse. Research and Advanced Technology for Digital Libraries: 21st International Conference on Theory and Practice of Digital Libraries, TPDL 2017, Thessaloniki, Greece, September 18-21, 2017, Proceedings, page 246--257. Cham, Springer International Publishing, (2017)