%AJiang, Linhua%ANing, Yuanhang%AFan, Xiaohui%AHo, Luis%ALuo, Bin%AWang, Feige%AWu, Jin%AWu, Xue-Bing%AYang, Jinyi%AZheng, Zhen-Ya%BJournal Name: Nature Astronomy; Journal Volume: 6; Journal Issue: 7 %D2022%I %JJournal Name: Nature Astronomy; Journal Volume: 6; Journal Issue: 7 %K %MOSTI ID: 10381310 %PMedium: X %TDefinitive upper bound on the negligible contribution of quasars to cosmic reionization %X %0Journal Article