APA

Gunnarsdottir M. J., Heidi J., Heikki K., Icelandic District Heating Association, Norwegian District Heating Association, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires), Heidi J., Heikki K., Icelandic District Heating Association & Norwegian District Heating Association.More dhcichp gives fewer climate problems. : .

Chicago

Gunnarsdottir Maria Jona, Heidi Juhler, Heikki Koivisto, Icelandic District Heating Association, Norwegian District Heating Association, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires), Heidi Juhler, Heikki Koivisto, Icelandic District Heating Association and Norwegian District Heating Association.More dhcichp gives fewer climate problems. : .

Harvard

Gunnarsdottir M. J., Heidi J., Heikki K., Icelandic District Heating Association, Norwegian District Heating Association, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires), Heidi J., Heikki K., Icelandic District Heating Association and Norwegian District Heating Association.More dhcichp gives fewer climate problems. : .

MLA

Gunnarsdottir Maria Jona, Heidi Juhler, Heikki Koivisto, Icelandic District Heating Association, Norwegian District Heating Association, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires), Heidi Juhler, Heikki Koivisto, Icelandic District Heating Association and Norwegian District Heating Association.: . .