**Refereed papers in professional journals**

- Leron, U., Hazzan, O. and Zazkis, R. (1995). Learning group isomorphism: Crossroads of many concepts, Educational Studies in Mathematics 29, pp. 153-174.
- Hazzan, O. and Leron, U. (1996). Students’ use and misuse of mathematical theorems: The case of Lagrange’s theorem, For the Learning of Mathematics 16(1), pp. 23-26.
- Hazzan, O. (1996). On topological properties of functions, For the Learning of Mathematics 16(3), pp. 39-42.
- Leron, U. and Hazzan, O. (1997). The world according to Johnny: A coping perspective in mathematics education, Educational Studies in Mathematics 32, pp. 265-292.
- Hazzan, O. and Goldenberg, E. P. (1996/1997). Students’ understanding of the notion of function in dynamic geometry environments, International Journal of Computers for Mathematical Learning 1(3), pp. 263-291.
- Zazkis, R. and Hazzan, O. (1998). Interviewing in mathematics education research: Choosing the questions, Journal of Mathematical Behavior 17(4), pp. 429-439.
- Hazzan, O. (1999). Reducing abstraction level when learning abstract algebra concepts, Educational Studies in Mathematics 40(1), pp. 71-90.
- Hazzan, O. and Zazkis, R. (1999). A perspective on “give an example” tasks as opportunities to construct links among mathematical concepts, FOCUS on Learning Problems in Mathematics 21(4), pp. 1-13.
- Hazzan, O. (2001). Reducing abstraction: The case of constructing an operation table of a group, Journal of Mathematics Behavior 20(2), pp. 163-172.
- Hazzan, O. and Zazkis, R. (2003). Mimicry of proofs with computers: The case of linear algebra, International Journal of Mathematical Education in Science and Technology 34(3), pp. 385 – 402.
- Movshovitz-Hadar, N. and Hazzan, O. (2004). The rhetoric of an outstanding lecturer or How to present it? International Journal of Mathematical Education in Science and Technology 35(6), pp. 793-812.
- Hazzan, O. and Zazkis, R. (2005). Reducing abstraction: The case of school mathematics, Educational Studies in Mathematics 58(1), pp. 101-119
- Leron, U. and Hazzan, O. (2006). The Rationality Debate: Application of cognitive psychology to mathematics education, Educational Studies in Mathematics 62(2), pp. 105-126.
- Leron, U. and Hazzan, O. (2009). Intuitive vs. analytical thinking: Four perspectives, Educational Studies in Mathematics 71(3), pp. 263 – 278.

**Refereed papers in conferences proceedings**

- Hazzan ,O. (1994). A students’ belief about the solutions of the equation x=x-1 in a group. Proceedings of the 18th international conference for the Psychology of Mathematics Education, Lisbon, Portugal, Vol. III, pp. 49-56.
- Leron, U., Hazzan, O. and Zazkis, R. (1994). Students’ constructions of group isomorphism. Proceedings of the 18th international conference for the Psychology of Mathematics Education, Lisbon, Portugal, Vol. III, pp. 152-159.
- Leron, U. and Hazzan, O. (1995). The world according to Dina: A coping perspective in math education. CIEAEM 47 Proceedings, Mathematics Education and Common Sense: The Challenge of Social Change and Technological Developments, Free University, Berlin, pp. 89-96.
- Goldenberg, E. P. and Hazzan, O. (1995). Proving: Relationships to construction, visualization and language. Proceedings of the Conference of Justifying and Proving in School Mathematics, London, England, pp. 106-125.
- Hazzan, O. and Zazkis, R. (1997). Constructing knowledge by constructing examples for mathematical concepts. Proceedings of the 21st International Conference for the Psychology of Mathematics Education, Lahti, Finland, Vol. 4, pp. 299-306.
- Hazzan, O. and Goldenberg, E. P. (1997). An expression of the idea of successive refinement in Dynamic Geometry environments. Proceedings of the 21st International Conference for the Psychology of Mathematics Education, Lahti, Finland, Vol. 3, pp. 49-56.
- Kontorovich, I. and Hazzan, O. (2014). Towards exploring expertise in mathematics education research: What are the requirements and duties of the researchers?,
*Proceedings of the Frontiers in Mathematics and Science Education Research Conference*(*FISER’14*), Famagusta – Turkish Republic of North Cyprus, pp. 160-168.