1. The Warwick analysis project: Practice and theory;Alcock,2001
2. Definitions: Dealing with categories mathematically;Alcock;For the Learning of Mathematics,2002
3. Limits;Cornu,1991
4. The notion of limit: Some seemingly unavoidable misconception stages;Davis;Journal of Mathematical Behavior,1986
5. You’re going to want to find out which and prove it. Collective argument in a mathematics classroom;Forman;Learning & Instruction,1998