Hobbs, Jerry R. «Natural language access to structured text». A: Proceedings of the 9th conference on Computational linguistics (en anglès). 1, 1982, p. 127–32. DOI10.3115/991813.991833.
Paltoglou, Georgios; Thelwall, Mike ACM Transactions on Intelligent Systems and Technology, 3, 4, 01-09-2012, pàg. 66. DOI: 10.1145/2337542.2337551. ISSN: 2157-6904.
Paltoglou, Georgios; Thelwall, Mike ACM Transactions on Intelligent Systems and Technology, 3, 4, 01-09-2012, pàg. 66. DOI: 10.1145/2337542.2337551. ISSN: 2157-6904.