Ehmer, J. (1990) „Pier Paolo Viazzo, Upland communities. Environment, population and social structure in the Alps since the sixteenth century (Cambridge Studies in Population, Economy and Society in Past Time 8), Cambridge University Press, Cambridge 1989“., Österreichische Zeitschrift für Geschichtswissenschaften, 1(1), S. 133–136. doi: 10.25365/oezg-1990-1-1-11.