1. New technologies for an effective energy retrofit of hospitals;Bizzarri;Applied Thermal Engineering,2006
2. G. Bakema, A.L. Snijders, B. Nordell, Underground Thermal Energy Storage, State of the Art Report 1994, Arnhem, The Netherlands (1995) 83 p.
3. Current status of ground source heat pumps and underground thermal energy storage in Europe;Sanner;Geothermics,2003
4. Thermal Energy Storage – Systems and Applications;Dincer,2002
5. Field test of vertical ground-coupled heat pump in Alabama;Kavanaugh;ASHRAE Transactions,1992