Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TSUKADA Hiroki and OZAKI Kohei and YAMADA Manabu,Tracking Control of Two-wheeled Quadrotor Helicopter Moving on Ground and Ceiling,Transactions of the Society of Instrument and Control Engineers,04534654,The Society of Instrument and Control Engineers,2018,54,10,776-784,https://cir.nii.ac.jp/crid/1390282763059191808,https://doi.org/10.9746/sicetr.54.776