AUTHOR=Song Xiaozhe , Lin Chuqiao , Zhang Rufeng , Jiang Tao , Chen Houhe TITLE=Corrigendum: Two-Stage Stochastic Scheduling of Integrated Electricity and Natural Gas Systems Considering Ramping Costs with P2G Storage and Wind Power JOURNAL=Frontiers in Energy Research VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.664782 DOI=10.3389/fenrg.2021.664782 ISSN=2296-598X