Automatic Excavation System with Multiple Excavators in the Pneumatic Caisson Method. - Kiichiro Ishikawa; Hiroki Harada; Hayato Osaki; Shingo Tsugawa; Shinichi Tachibana; Hideyuki Fujisawa; Taichi Terui; Kiyoshi Nakamura; Yusen Inagawa (J. Robotics Mechatronics, 2024)