• Basics of optimal design of district heating pipelines diameters and design examples of Estonian old non-optimised district heating networksHlebnikov, Aleksandr; Siirde, Andres; Paist, Aadu4th International Symposium Topical Problems of Education in the Field of Electrical and Power Engineering. Doctoral School of Energy and Geotechnology : Kuressaare, Estonia, January 15-20, 20072007 / p. 149-153 : ill