Introduction of conics in form 11 with the help of GeoGebra

WURNIG, Otto. Introduction of conics in form 11 with the help of GeoGebra. 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. 31-32.