Digital Libraries for Open Knowledge 22nd International Conference on Theory and Practice of Digital Libraries, TPDL 2018, Porto, Portugal, September 10-13, 2018, Proceedings - Méndez, Eva; Méndez, Eva; Crestani, Fabio; Crestani, Fabio; Ribeiro, Cristina; Ribeiro, Cristina; David, Gabriel; David, Gabriel; Lopes, João Correia; Lopes, João Correia (Springer International Publishing : Imprint: Springer, 2018)