• Analysis and study of the influence of the geometrical parameters of mini unmanned quad-rotor helicopters to optimise energy savingPenkov, Igor; Aleksandrov, DmitriInternational journal of automotive and mechanical engineering2017 / p. 4730-4746 : ill https://doi.org/10.15282/ijame.14.4.2017.11.0372 https://www.scopus.com/sourceid/21100235622 https://www.scopus.com/record/display.uri?eid=2-s2.0-85044041255&origin=inward&txGid=678846bf84109314a2811eb5ec00328c
• Axial displacements in ball screw mechanisms with two and four contact-pointPenkov, Igor; Aleksandrov, DmitriInternational review of mechanical engineering2011 / p. 1213-1218 https://www.researchgate.net/publication/289762576_Axial_displacements_in_ball_screw_mechanisms_with_two_and_four_contact-point
• Efficiency optimization of mini unmanned multicopterPenkov, Igor; Aleksandrov, DmitriInternational review of aerospace engineering2017 / p. 277-281 : ill https://doi.org/10.15866/irease.v10i5.12132 https://www.scopus.com/sourceid/21100331504 https://www.scopus.com/record/display.uri?eid=2-s2.0-85038258661&origin=inward&txGid=a8f6125f92a3715757ee1fd449eed8c8
• Energy consumption of mini UAV helicopters with different number of rotorsAleksandrov, Dmitri; Penkov, Igor11th International Symposium "Topical Problems in the Field of Electrical and Power Engineering." Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 16-21, 20122012 / p. 259-262 : ill
• Energy saving types of mini unmanned aerial vehiclesAleksandrov, Dmitri; Penkov, Igor9th International Symposium "Topical problems in the field of electrical and power engineering". Doctoral school of energy and geotechnology. II : Pärnu, Estonia, June 14-19, 20102010 / p. 117-120 : ill
• Fluid flow optimization on semiautomatic code marker baseAleksandrov, Dmitri; Penkov, Igor8th International Symposium "Topical Problems in the Field of Electrical and Power Engineering" : Doctoral School of Energy and Geotechnology. II : [Pärnu, January 11-16, 2010 : proceedings]2010 / p. 306-308 : ill
• Fluid flow optimization on semiautomatic code marker baseAleksandrov, Dmitri; Penkov, IgorJournal of energy and power engineering2012 / p. 916-920 : ill https://www.academia.edu/84941764/Fluid_Flow_Optimization_on_Semiautomatic_Code_Marker_Base?uc-sb-sw=19159372
• Increasing of power characteristics of mini UAV helicopter by changing of its geometrical parametersAleksandrov, Dmitri; Penkov, IgorMachines, technologies, materials : [virtual journal]2012 / p. 30-32 : ill http://trans-motauto.com/sbornik/2012/22.INCREASING%20OF%20POWER%20CHARACTERISTICS%20OF%20MINI%20UAV%20HELICOPTER%20BY%20CHANGING%20OF%20ITS%20GEOMETRICAL%20PARAMETERS.pdf
• Influence of nozzle geometry on fluid flow parametersPenkov, Igor; Aleksandrov, DmitriInternational journal of applied mechanics and engineering2020 / p. 215-222 : ill https://doi.org/10.2478/ijame-2020-0060 https://www.scopus.com/sourceid/21100464514 https://www.scopus.com/record/display.uri?eid=2-s2.0-85097540401&origin=inward&txGid=c15d8fa405281934f623c84a4c127c92
• Light-weight multicopter structural design for energy saving = Kergklassi multikopteri energiatarbe vähendamise konstruktsioonilised lahendusedAleksandrov, Dmitri2013 http://www.ester.ee/record=b2994326*est
• Optimal gap distance between rotors of mini quadrotor helicopterAleksandrov, Dmitri; Penkov, IgorProceedings of the 8th International Conference of DAAAM Baltic Industrial Engineering, 19-21st April 2012, Tallinn, Estonia. 12012 / p. 251-255 : ill
• 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
• Optimization of lift force of mini quadrotor helicopter by changing of gap size between rotorsAleksandrov, Dmitri; Penkov, IgorMechatronic systems and materials IV2013 / p. 226-231 : ill https://doi.org/10.4028/www.scientific.net/SSP.198.226 https://www.scopus.com/sourceid/21100305259 https://www.scopus.com/record/display.uri?eid=2-s2.0-84875984775&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.4028%2Fwww.scientific.net%2FSSP.198.226%29&sessionSearchId=4a42d4bf2ceb805f2ef7f5f687f0741e https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SOLID%20STATE%20PHENOM&year=2005 https://www.webofscience.com/wos/woscc/full-record/WOS:000319299900036
• Propeller shrouding influence on lift force of mini unmanned quadcopterPenkov, Igor; Aleksandrov, DmitriInternational journal of automotive and mechanical engineering2017 / p. 4486-4495 : ill https://doi.org/10.15282/ijame.14.3.2017.7.0354 https://www.scopus.com/sourceid/21100235622 https://www.scopus.com/record/display.uri?eid=2-s2.0-85040460079&origin=inward&txGid=b6ea75aa4d8c602b5e855e767be3b5bc
• Rotor lifting force optimization by changing dimensions of rim around itAleksandrov, Dmitri; Penkov, Igor13th International Symposium "Topical Problems in the Field of Electrical and Power Engineering." Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 14-19, 20132013 / p. 292-295 : ill