1. Rational and affine expressions for image description;Culik;Disc. Appl. Math.,1993
2. Quadtrees generated by finite automata;Berstel,1989
3. Compact Representation of Pattern by Finite Automata;Berstel,1989
4. Two methods for generating fractals;Shallit;Comp. & Graph.,1989
5. Quadtrees and the Hausdorff dimension of pictures;Staiger,1989