1. Hersh WR, Campbell EM, Malveau SE. Assessing the feasibility of large-scale natural language processing in a corpus of ordinary medical records: a lexical analysis. In: Proceeding on AMIA annual fall symposium. 1997. p. 580–4.
2. Zhou L, Mahoney LM, Shakurova A, Goss F, Chang FY, Bates DW, Rocha RA. How many medication orders are entered through free-text in EHRs?–a study on hypoglycemic agents. AMIA Annu Symp Proc. 2012;2012:1079–88.
3. Ruch P, Baud RH, Geiddbühler A, Lovis C, Rassinoux A-M, Riviere A. Looking back or looking all around: comparing two spell checking strategies for documents edition in an electronic patient record. In: Proceedings of the AMIA symposium: 2001. New York: American Medical Informatics Association; 2001.
4. Fan JW, Prasad R, Yabut RM, Loomis RM, Zisook DS, Mattison JE, Huang Y. Part-of-speech tagging for clinical text: wall or bridge between institutions? AMIA Annu Symp Proc. 2011;2011:382–91.
5. Doan S, Bastarache L, Klimkowski S, Denny JC, Xu H. Integrating existing natural language processing tools for medication extraction from discharge summaries. J Am Med Inform Assoc. 2010;17(5):528–31.