SourceScore
HIGHEST MODERN REFERENCE — OPEN-ACCESS + MACHINE-READABLE · BY MODERN REFERENCE

Best paywall-free sources for citation by Modern Citation Reference

Same 15 sources, re-sorted by Modern Citation Reference only — different signal than the composite Index. The leader changes: DOI (CrossRef Resolver) takes the top position at A+ · 98.

Leader by Modern Reference

DOI (CrossRef Resolver) leads best paywall-free sources for citation on Modern Citation Reference at A+ · 98

Modern Reference mean
94
Average Modern Reference across these 15 sources
Composite mean
93
Average SourceScore Index across the same 15 sources
Δ vs composite
+1
These sources score higher on Modern Reference than overall
Same list, different signal
Composite Index (default)By DisciplineBy Velocity
  1. 1
    DOI (CrossRef Resolver)doi.org

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

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

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

    Modern Reference A+ · 95·Index A+ · 96·Government
    A+·95
  3. 3
    arXivarxiv.org

    Open-access preprint server for physics, mathematics, computer science; ~2.4M papers since 1991.

    Modern Reference A+ · 95·Index A · 89·Academic
    A+·95
  4. 4
    MDN Web Docsdeveloper.mozilla.org

    Mozilla-stewarded web-platform reference since 2005; default citation for HTML, CSS, JS, Web APIs.

    Modern Reference A+ · 95·Index A · 93·Reference
    A+·95
  5. 5
    U.S. National Institutes of Healthnih.gov

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

    Modern Reference A · 94·Index A+ · 95·Government
    A·94
  6. 6
    U.S. Census Bureaucensus.gov

    Federal statistical agency for U.S. demographic + economic data; primary-source decennial census + ACS surveys.

    Modern Reference A · 94·Index A · 94·Government
    A·94
  7. 7
    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·Government
    A·94
  8. 8
    NASAnasa.gov

    U.S. space agency; primary source for space exploration + Earth science + aeronautics research.

    Modern Reference A · 94·Index A · 93·Government
    A·94
  9. 9
    U.S. Bureau of Labor Statisticsbls.gov

    Federal statistical agency for U.S. labor + price data; CPI, employment, unemployment, productivity.

    Modern Reference A · 93·Index A · 94·Government
    A·93
  10. 10
    U.S. Centers for Disease Control and Preventioncdc.gov

    Federal agency for U.S. public-health surveillance + disease prevention; primary-source MMWR + WONDER data.

    Modern Reference A · 93·Index A · 94·Government
    A·93
  11. 11
    Wikipedia (English)en.wikipedia.org

    Crowd-edited encyclopedia with ~7M articles and per-article inline citation discipline.

    Modern Reference A · 92·Index A · 94·Reference
    A·92
  12. 12
    PubMedpubmed.ncbi.nlm.nih.gov

    U.S. National Library of Medicine literature index covering ~36M biomedical citations.

    Modern Reference A · 92·Index A · 94·Academic
    A·92
  13. 13
    Semantic Scholarsemanticscholar.org

    AI-powered academic search engine by Allen Institute for AI; ~200M+ papers indexed.

    Modern Reference A · 92·Index B · 83·Academic
    A·92
  14. 14
    U.S. Food and Drug Administrationfda.gov

    Federal agency for food + drug + medical-device safety; primary-source approvals + safety alerts.

    Modern Reference A · 92·Index A · 94·Government
    A·92
  15. 15
    U.S. National Oceanic and Atmospheric Administrationnoaa.gov

    Federal scientific agency for weather + ocean + climate data; primary-source forecasts + climate research.

    Modern Reference A · 92·Index A · 93·Government
    A·92

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 source pool but ranks ONLY by Modern Citation Reference. The biggest re-shuffle: .

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