DEMİRAY, E. And IŞIKSAL BOSTAN, M. 2017. Pre-service middle school mathematics teachers' interpretation of logical equivalence in proof by contrapositive. 10th Congress of the European-Society-for-Research-in-Mathematics-Education (CERME) , (Dublin, Ireland), 139-146.

DEMİRAY, E., & IŞIKSAL BOSTAN, M., (2017). Pre-service middle school mathematics teachers' interpretation of logical equivalence in proof by contrapositive . 10th Congress of the European-Society-for-Research-in-Mathematics-Education (CERME) (pp.139-146). Dublin, Ireland

DEMİRAY, ESRA, And MİNE IŞIKSAL BOSTAN. "Pre-service middle school mathematics teachers' interpretation of logical equivalence in proof by contrapositive," 10th Congress of the European-Society-for-Research-in-Mathematics-Education (CERME), Dublin, Ireland, 2017

DEMİRAY, ESRA And IŞIKSAL BOSTAN, MİNE I. . "Pre-service middle school mathematics teachers' interpretation of logical equivalence in proof by contrapositive." 10th Congress of the European-Society-for-Research-in-Mathematics-Education (CERME) , Dublin, Ireland, pp.139-146, 2017

DEMİRAY, E. And IŞIKSAL BOSTAN, M. (2017) . "Pre-service middle school mathematics teachers' interpretation of logical equivalence in proof by contrapositive." 10th Congress of the European-Society-for-Research-in-Mathematics-Education (CERME) , Dublin, Ireland, pp.139-146.

@conferencepaper{conferencepaper, author={ESRA DEMİRAY And author={MİNE IŞIKSAL BOSTAN}, title={Pre-service middle school mathematics teachers' interpretation of logical equivalence in proof by contrapositive}, congress name={10th Congress of the European-Society-for-Research-in-Mathematics-Education (CERME)}, city={Dublin}, country={Ireland}, year={2017}, pages={139-146} }