• Modular multi-rotor helicopter platformsTiimus, Kristjan; Tamre, MartMechatronic systems and materials VI2015 / p. 110-115 : ill https://doi.org/10.4028/www.scientific.net/SSP.220-221.110 https://www.scopus.com/sourceid/21100305259 https://www.scopus.com/record/display.uri?eid=2-s2.0-84922181677&origin=inward&txGid=ee1f141f3f700928498a508431c8c75c