@article{TM2_2012_XV_1_a1,
     author = {Borislav Lazarov},
     title = {An approach to incorporate dynamic geometry systems in secondary school--model with module},
     journal = {The Teaching of Mathematics},
     pages = {21 },
     publisher = {mathdoc},
     volume = {XV},
     number = {1},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2012_XV_1_a1/}
}