@article{AMI_2011_38_a13,
     author = {L\'aszl\'o Budai},
     title = {GeoGebra in fifth grade elementary mathematics at rural schools},
     journal = {Annales mathematicae et informaticae},
     pages = {129--136},
     publisher = {mathdoc},
     volume = {38},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2011_38_a13/}
}