@article{Kertil2021_493147,
author={Mahmut Kertil},
title={Conceptual Analysis of Derivative as a Rate of Change and Analysis of the Mathematics Textbooks},
year={2021},
journal={Sakarya University Journal of Education},
issn={2146-7455},
volume={11},
number={3},
url={http://search/yayin/detay/493147}
}