September 20, 2021 (appearing in searches as part of the September 22 cycle).
This paper was published in Science (Vol 373, Issue 6557) and is widely cited for its comprehensive supplementary data, which is often downloaded as a zip file for replication.
Unable to download zipped media files - Kobo On Your Own Server
KoboToolbox released several patches around July–September 2021 (e.g., version 2.021.24 ), which prompted many users to download media exports via zip files.
A paper titled "On the finite basis of two-loop 't Hooft-Veltman Feynman..." references work from 2021 (922 [2021] 1) related to computational integrals.
"Impact of COVID-19 lockdown on suicide attempts," published in Wiener Klinische Wochenschrift , Volume 133, pages 915–922, 2021.
Rare variant MX1 alleles increase human susceptibility to zoonotic H7N9 influenza.