• The author in the Text: Hedging Scientific Writing K.Hyland [1995][PDF] 
• The Language of Bioscience: Facts, Speculations and Statements in Between Light et al. [2004] [PDF]
• Annotating and Recognizing Event Modality in Text Saurí et al. [2006] [PDF]
• SlinkET: A partial modal parser for events. Saurí et al. [2006] [PDF]
• Weakly supervised learning for hedge classification in scientific literature B.Medlock and T. Briscoe [2007] [PDF]
• Exploring hedge identification in biomedical literature - B. Medlock [2008] 
• Hedge classification in biomedical texts with a weakly supervised selection of keywords  György Szarvas [2008] [PDF]
• Expression of Modality in Biomedical Texts . Renáta Panocová [2008] [PDF]
• Categorising Modality in Biomedical Texts. Thompson et al. [2008] [PDF]
• Learning the Scope of Hedge Cues in Biomedical Textsm [2008]
• A metalearning approach to processing the scope of negation. R.Morante and W.Daelemans [2009] [PDF]
• Learning the scope of hedge cues in biomedical texts. R. Morante and W. Daelemans. [2009] [PDF]
• Knowledge Claims in Scientific Literature, Uncertainty and Semantic Annotation: A Case Study in the biological Domain [2009][PDF]
• "Confortation": About a New Category for Analyzing Biomedical Texts D.Battistelli et al. [2009] [PDF]
• Modalité épistémique et discours scientifique Eva Thue Bold [2008] [PDF]
• Hedging in scientifically oriented discourse. Exploring variation according to discipline and intended audience T. Varttala [2001] [PDF]

• The author in text: Hedging Scientific Writing K.Hyland [1995]
• Writing without conviction? Hedging in Scientific research articles [1995]
• Proceedings del Shared Task del CoNLL 2010 [PDF]

   The BioScope corpus: biomedical texts annotated for uncertainty, negation and their scopes. Vincze et al.  [2008] [PDF]

• BioInfer: A corpus for information extraction in the biomedical domain. S. Pyysalo et al. [2007] [PDF]
• Corpus annotation for mining biomedical events from literature, J.Kim, T.Ohta, J.Tsujii 2008 [PDF]