Tamura, H. <https://pure.iiasa.ac.at/view/iiasa/1607.html>, Nakanishi, R., Hatono, I., & Umano, M.  (1996).  Is environmental tax effective for total emission control of carbon dioxide? Systems analysis of environmental-economic model.   In: Preprints 13th IFAC Congress, 1-5 July 1996.