Engelenburg, B. W. C. v., Rossum, T. M. F. v., Vringer, K., and Blok, K. (1994). Calculating the energy requirements of household purchases --- a practical step by step method. Energy Policy, 22(8), 648-656.
An accurate and fast method is presented for calculating the energy requirement of consumption items. The method combines process analysis and input-output analysis. The energy requirement of a particular consumption item is calculated in ten steps, each dealing with certain parts of the production network. Each step can be standardized to a large extent. The method is illustrated by applying it to one product: a domestic refrigerator.