An algorithm for region filling using two-dimensional grammars. - Edward T. Lee; Y. J. Pan; Peng-Ching Chu (Int. J. Intell. Syst., 1987)

Generating Rectangles using Two-Dimensional Grammars with Time and Space Complexity Analyses. - Edward T. Lee; Shangyong Zhu; Peng-Ching Chu (Int. J. Pattern Recognit. Artif. Intell., 1989)

Generating Rectangles using Two-Dimensional Grammars with Time and Space Complexity analyses. - Edward T. Lee; Shangyong Zhu; Peng-Ching Chu (Array Grammars, Patterns and Recognizers, 1989)