SourceScore
A+ TIER · BY MODERN REFERENCE · 4 sources

A+-tier sources by Modern Citation Reference

The same 4 sources that hold composite SourceScore A+ (95–100) re-ranked by Modern Citation Reference only. DOI (CrossRef Resolver) takes the top position at A+ · 98.

Biggest mover

DOI (CrossRef Resolver) jumps 2 positions in the Modern Reference ranking vs the composite — punches above weight on Modern Citation Reference.

Modern Reference mean
95
Average Modern Reference across these 4 sources
Composite mean
95
Average SourceScore Index across the same sources
Δ vs composite
0
Same as composite mean
Same tier, different signal
Composite Index (default)By DisciplineBy Velocity
  1. 1
    DOI (CrossRef Resolver)doi.org↑2

    International standard identifier resolver for academic citations (~150M+ DOIs).

    Modern Reference A+ · 98·Index A+ · 95
    A+·98
  2. 2
    U.S. Securities and Exchange Commissionsec.gov↓1

    Primary-source regulator publishing every public-company filing (13F, 10-K, 8-K, etc.) since 1934.

    Modern Reference A+ · 95·Index A+ · 96
    A+·95
  3. 3
    U.S. National Institutes of Healthnih.gov↓1

    U.S. federal medical research agency operating PubMed, NCBI, MedlinePlus, and trial registries.

    Modern Reference A · 94·Index A+ · 95
    A·94
  4. 4
    Federal Reserve Systemfederalreserve.gov

    U.S. central bank; primary source for monetary policy + economic data + financial-system statistics.

    Modern Reference A · 94·Index A+ · 95
    A·94

Why this ranking is different

The composite SourceScore Index averages all three sub-scores — Citation Discipline, Modern Reference, and Citation Velocity. This page surfaces the SAME composite-A+ sources but ranks ONLY by Modern Citation Reference. Sources can hold the same composite grade with very different sub-score profiles — this view reveals the ranking that emerges when one dimension is the only signal.

Use this view when modern citation reference is the decision-relevant signal for your citation. The composite Index is the safer default; this dim-faceted view is the precision lens.