1. ALARCOS LLORACH, E., (1961), Fonologia Espanola. Madrid, Gredos.
2. DELATTRE, P., (1965), Comparing the phonetic features of English, German, Spanish and French. Heidelberg: J. Groos.
3. DELATTRE, P. and Olsen, C., (1969), Syllabic features and phonic impression in English, German, French and Spanish. Lingua, 22: 160-175.
4. GUIRAO, M. and Borzone de Manrique, A.M., (1972), Fonemas, silabas y palabras del espanol de Buenos Aires. Filologia, XVI: 135-165.
5. GUIRAO, M. and García Jurado, M.A., (1987), A statistical approach to Spanish American phonological units. Proceedings of the XIth International Congress of Phonetic Sciences, 4, 132-135.