🔒 Closed-access download helpers (by publisher)

• Elsevier — 379 papers
• JSTOR — 252 papers
• Wiley — 126 papers
• Springer — 96 papers
• Schweizerbart — 46 papers
• Magnolia Press (Zootaxa) — 41 papers
• Cambridge University Press — 31 papers
• American Physiological Society — 31 papers
• CSIRO Publishing — 18 papers
• Taylor & Francis — 15 papers
• Smaller publishers (<15 each) — 454 papers