@article{Paakki_Toppola_1990, title={An error-recovering form of DCGs}, volume={9}, url={https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3368}, number={3}, journal={Acta Cybernetica}, author={Paakki, Jukka and Toppola, Kari}, year={1990}, month={Jan.}, pages={211-221} }