1. (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)
2. 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)
3. (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)
4. 青野正明· 津田井昭彦· 久保寔· 板谷良平:「可変色放電管」,電気学会光源·関連装置研資,LS-74-1 (1974)
5. A Method to Change Luminous Color of a Positive Column by Controlling Pulse Rise Time