TY - BOOK AU - Martins, J. P., ed. AU - Morgado, E. M., ed. AU - Portuguese Conference on artificial intelligence ( Lisbon : 1989 ) TI - EPIA '89 T2 - Lecture notes in artificial intelligence SN - 3500516654 U1 - 006.3 PY - 1989/// CY - Berlin PB - S-V ER -