(1) R. Itatani and M. kubo: “Control of Luminescent Color”, The Papers of Technical Meeting on Plasma Science and Technology, IEE Japan, EP-73-2 (1973) (in Japanese)
板谷良平· 久保寔:「放電光色の制御」,電気学会プラズマ研資,EP-73-2 (1973)
(2) M. Aono, A. tsudai, M. Kubo, and R. Itatani: “Color Variable Lamp”, The Papers of Technical Meeting on Related Equipment, IEE Japan, LS-74-1 (1974) (in Japanese)
(3) M. Ryuko, T. Fujino, T. Sato, M. Kubo, and R. Itatani: “A Method to Change Luminous Color of a Positive Column by Controlling Pulse Rise Time”, J. Illuminating Enging Inst. Jpn, Vol. 65 pp. 513-519 (1981) (in Japanese)