1. Allen, R. G. D.; Bowley, A. L.: Family expenditure: a study of its variation. London School of Economics and Political Science, Studies in Statistics and Scientific Method, No. 2. King, London 1935.
2. Aymard, M.: Towards a history of nutrition: some methodological remarks. In: Forster, R.; Ranum, O. (eds.), Food and drink in history, pp. 1–16 Johns Hopkins University Press, Baltimore 1979.
3. Baudet, G.; van der Meulen, H.: Food consumption and welfare 1852–1911. In: Baudet, G.; van der Meulen, H. (eds.), Consumer behaviour and economic growth in the modern economy, pp. 73–108. Croom Helm, London 1982.
4. Bowler, I. R.; Ilbery, B. W.: Redefining agricultural geography. Area 19, 327–332 (1987)
5. Burk, M. C.: Ramifications of the relationship between income and food. Journal of Farm Economics 44, 115–125 (1962)