Montalbetti, M. (1988). C. Lleo, Sorne Optional Rules in Spanish Complementation. Towards a Study of the Speaker’s Intent, Tübingen (Max Niemeyer Verlag), 1979, 20I p. Lexis, 12(2), 206. Recuperado a partir de http://revistas.pucp.edu.pe/index.php/lexis/article/view/5364