• Richard N. Shiffman, George Michel, Michael Krauthammer, Norbert E. Fuchs, Kaarel Kaljurand, and Tobias Kuhn. Writing Clinical Practice Guidelines in Controlled Natural Language. In Norbert E. Fuchs, editor, Proceedings of the Workshop on Controlled Natural Language (CNL 2009). Springer (to be published).
• Tamseela Hussain, George Michel, Richard N. Shiffman: The Yale Guideline Recommendation Corpus: A Representative Sample of the Knowledge Content of Guidelines, International Journal of Medical Informatics, Volume 78, Issue 5, Pages 354-363 .
• Tamseela Hussain, George Michel, Richard N. Shiffman: How Often is Strength of Recommendation Indicated in Guidelines? Analysis of the Yale Guideline Recommendation Corpus , Proc AMIA Symp 2008 Nov 6:984.