3L.Lopez ,J.M. Blanco ,J.J. Bonilla et al, Determination of energy and exergy of waste heat in the industry of the Basque county, Applied Thermal Engineering, 18 (3-4) ( 1998 ) 187-197.
4J. Karkheek,J. Powell,Prospeets for the Ulilization of Waste Heat in Large Seale District Heating Systems ,Sponsor: Energy Research anti Development Administration, Report: CONF - 770516-2,1977.
5R.W. Timmerman,Utihzation of power plant waste heat for heating,Proceedings -Annual Offshore Technology Conference,3 (1979): 2065-2083.