Active Autorotation of Micro Aerial Vehicle with Foldable Winged Shell for Impact Mitigation during Free Fall. - Quek Ching Alvin; Kazunori Ohno; Yoshito Okada; Daiki Fujikura; Satoshi Abe; Masaki Takahashi; Zitong Han; Satoshi Tadokoro (ICRA, 2022)