日本航空宇宙学会誌の宇宙エレベーター特集に記事掲載
宇宙エレベーターは建設費が回収できるまで残存できるか？，花田 俊也
Professor Hanada's article has been published in a special feature on the latest research trends in space elevators in the Journal of the Japan Society for Aeronautical and Space Sciences Vol. 72, No. 12.
"Can Space Elevator Survive until Its Construction Costs Can be Recovered?", Toshiya Hanada