TY - JOUR AU - Victor Mitrana AU - Grzegorz Rozenberg PY - 1999/01/01 Y2 - 2024/03/29 TI - Some properties of duplication grammars JF - Acta Cybernetica JA - Acta Cybern VL - 14 IS - 1 SE - Regular articles DO - UR - https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3518 AB - ER -