Ryoichi Fujii; Natsuo Sato; Takayuki Ono; Hiroshi Fukunishi; Takeo Hirasawa; Susumu Kokubun; Takashi Araki; Thorsteinn Saemundsson: "Conjugacy of Rapid Motions and Small-scale Deformations of Discrete Auroras by All-sky TV Observations" Mem. Natl Inst. Po