Fairness in context-free grammars under canonical derivations - Porat, Sara; Francez, Nissim (haṭ- Ṭeḵniyyôn, Māḵôn Ṭeḵnôlôgî le-Yiśrā'ēl <Ḥêfā> / Department of Computer Science: Technical report, 1984)