@article{VM_2002_4_1_a8,
     author = {Dr. Kurt Endl and Dr. Robert Endl},
     title = {Software for {Geometry}},
     journal = {Visual Mathematics},
     year = {2002},
     volume = {4},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2002_4_1_a8/}
}