P. H. Le and  J. Molina and  S. Hirai,  Application of Japanese Origami Ball for Floating Multirotor Aerial Robot.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2014, vol. 94(10). 1740 - 1743
    [viewed 07 May 2021]. Available from: https://publications.waset.org/pdf/9999669.