The influence of the graphing calculator on the development of some mathematical activities of pupils in the age between 13-16 years old

HERMA, Agnieszka. The influence of the graphing calculator on the development of some mathematical activities of pupils in the age between 13-16 years old. In Proceedings of the 8th International Conference on Technology in Mathematics Teaching x, 46 s. + 1 CD-ROM. ISBN 978-80-7041-285-5 (brož.) International Conference on Technology in Mathematics Teaching. Hradec Králové : Gaudeamus, 2007, s. 34.