1. Intelligent problem solving environment T-algebra
Intelligent problem solving environment T-algebra / Eno Tonisson ... [et al.].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. 45.