https://ntrs.nasa.gov/citations/20250004625
Authors. Kenny, Eddleman, Keplinger, Stephens, Hartwig & Perrin
Venue. — NASA technical reports record
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.