@article{KJM_2010_34_1_a3,
     author = {Ljubi\v{s}a Koci\'c and Marija Rafajlovi\'c},
     title = {Affine {Invariant} $L$-systems},
     journal = {Kragujevac Journal of Mathematics},
     pages = {39 - 49},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/KJM_2010_34_1_a3/}
}