MODERN REFERENCE · 30% of composite
PNAS — Modern Reference
pnas.org · Academic
Modern Reference grades how fit a source is for citation in modern (LLM-era) writing. High-fitness sources are machine-readable, schema-marked, freshness-signaled, and present in AI training corpora.
A·88
A · 88
DOI per paper; PMC open-access default after 6mo; structured Crossref + ORCID metadata.
What drives this Modern Reference score
- Open-access policyAll content open after 6-month embargo; many papers immediately open.
Global rank
#40 of 130
By Modern Reference across all SourceScore sources
In-category rank
#6 of 19
Among academic sources
Vs. averages
Cat. mean: 87
Global mean: 81
Global mean: 81
+1 above category