L. Gjersing, J. Caplehorn, and T. Clausen. BMC medical research methodology, 10 (1):
13(January 2010)5507<m:linebreak></m:linebreak>M3: 10.1186/1471-2288-10-13;<m:linebreak></m:linebreak>Validació d'escales.
S. Bordia, and S. Bowman. Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Student Research Workshop, page 7--15. Minneapolis, Minnesota, Association for Computational Linguistics, (June 2019)