@article{VM_2000_2_1_a6,
     author = {Tommy Dreyfus and Theodore Eisenberg},
     title = {On {Symmetry} in {School} {Mathematics}},
     journal = {Visual Mathematics},
     year = {2000},
     volume = {2},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/VM_2000_2_1_a6/}
}