• Optimization mini unmanned helicopter energy consumption by changing geometrical parameters of coaxial rotor pairsAleksandrov, Dmitri; Penkov, Igor12th International Symposium "Topical Problems in the Field of Electrical and Power Engineering." Doctoral School of Energy and Geotechnology II : Kuressaare, Estonia, June 11-16, 20122012 / p. 139-141 : ill