1. Basu P. Fluidized bed boilers. Toronto: Pergamon Press; 1984
2. Regarding global methodology to estimate the energy-ecologic efficiency of thermopower plants;Cârdu;ECM,1999
3. Regarding of a new variant methodology to estimate globally the ecologic impact of the thermopower plants;Cârdu;ECM,1999
4. Achievement in the field of fluidized bed firing boilers;Cârdu;ECM,1992
5. Ionel I, Ungureanu C. Thermoenergetics and the environment, Bucharest: Technical Publisher; 1996 [in Romanian]