https://www.nature.com/articles/s41567-020-01076-0
Authors. Kolobov, Golubkov, Munoz de Nova and Steinhauer
Venue. Nature Physics 17
How the Institute flags it
established 1 time frontier 1 time
This source carries more than one flag across the corpus. That is not an inconsistency to resolve: the same work can be established evidence for one claim and frontier evidence for another, and the flag belongs to the use rather than to the source.