1. Operational Performance of Electric Power Firms: Comparison between Japan and South Korea by Non-Radial Measures
2. Greenhouse Gas Emissionshttps://stats.oecd.org/Index.aspx?DataSetCode=AIR_GHG
3. Japan Aims for Zero Emissions, Carbon Neutral Society by 2050https://www.reuters.com/article/uk-japan-politics-suga/japan-aims-for-zero-emissions-carbon-neutral-society-by-2050-pm-idUKKBN27B0C7
4. South Korea’s Moon Targets Carbon Neutrality by 2050https://www.reuters.com/article/us-southkora-environment-greenewdeal-idUSKBN27D1DU
5. A System of Logic: Ratiocinative and Inductive: Being a Connected View of the Principles of Evidence and the Methods of Scientific Investigation;Mill,1875