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2. Heat Pumps in Industry;Moser,1985
3. Chemical heat pumps drive to upgrade waste heat;Clark;Chem. Engng,1984
4. Heat transformers with self-circulation: Design and preliminary operational data;Eriksson;Int. J. Refrig.,1989
5. Heat transformer systems for evaporation applications in the pulp and paper industry;Abrahamsson;Nordic Pulp Paper Research J.,1991