D. Röthlisberger, M. Denker, and É. Tanter. Computer Languages, Systems & Structures, 34 (2–3):
46 - 65(2008)Best Papers 2006 International Smalltalk Conference.
D. Röthlisberger, O. Greevy, and O. Nierstrasz. ICDL '07: Proceedings of the 2007 international conference on Dynamic languages, page 79--100. New York, NY, USA, ACM, (2007)