No evidence for global decrease in CO₂ concentration during the first wave of COVID-19 pandemic,(Jenug-Soo Huh 외)Environ Monit Assess (2021)193:751https://link.springer.com/article/10.1007%2Fs10661-021-09541-w
Measurement and verification analysis on the energy performance of a retrofit residential building after energy efficiency measures using RETScreen Expert, 허증수 외, ALEXANDRIA ENGINEERING JOURNAL, 59(6), 4643~4657, 2020.12