R. Pöschel, and I. Rosenberg. Boolean Models and Methods in Mathematics, Computer Science, and Engineering, volume 134 of Encyclopedia of Mathematics and its Applications, Cambridge University Press, (2010)
J. Wollbold, R. Guthke, and B. Ganter. Third International Conference, AB 2008, Castle of Hagenberg, Austria, July 31-August 2, volume 5147 of Lecture Notes in Computer Science. Volume, page 230--244. (2008)
S. Middleton, D. Roure, and N. Shadbolt. K-CAP '01: Proceedings of the 1st international conference on Knowledge capture, page 100--107. New York, NY, USA, ACM, (2001)