P. Cobb, E. Yackel, and T. Wood. The Emergence of Mathermatical Meaning: Interactions in Classroom Cultures, Lawrence Erlbaum Associates, Hillside, NJ, (1995)
E. Yackel, and P. Cobb. Nineteenth International Conference for the Psychology of Mathematics Education, page 264-271. Recife, Brazil, Program Committee of the 19th PME Conference, (1995)
P. Cobb, and H. Bauersfeld. The Emergence of Mathermatical Meaning: Interactions in Classroom Cultures, Lawrence Erlbaum Associates, Hillside, NJ, (1995)