@article{VM_2002_4_1_a11,
     author = {Ilija Knezevi\'c and Radmila Sazdanovi\'c and Srdjan Vukmirovi\'c},
     title = {Visualization of the {Lobachevskian} {Plane}},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2002},
     url = {http://geodesic.mathdoc.fr/item/VM_2002_4_1_a11/}
}