1. Torikai H, Murashita T, Ito A, Metoki T (2011) Extinguishment of a laminar jet diffusion flame using a soap bubble filled with nitrogen gas. In: Proceeding of the tenth international symposium on fire safety science, pp 557–568.
2. Murashita T, Torikai H, Ito A (2012) Visualization of extinguishing gas flow released from bursting soap bubble.Vis Mech Process 2(2). doi: 10.1615/VisMechProc.vl.i4.70 .
3. Watanabe K, Torikai H, Ito A (2013) Extinuishment of a jet diffusion flame with inert-gas soap bubble transported by a vortex ring. In: The 24th international on transport phenomena, pp 664–670.
4. Torikai H, Narita M, Ito A (2013) Extinguishment of pool fire with rubber balloon inflated with inert gas. In: The 24th international on transport phenomena, pp 682–688.
5. Ogawa S, Kudo S, Koide M, Torikai H, Iwatani Y (2014) Development and control of an aerial extinguisher with an inert gas capsule. In: IEEE international conference on robotics and biomimetics, pp 1320–1325.