Full Idea
Burali-Forti didn't discover any paradoxes, though his work suggested a paradox to Russell.
Gist of Idea
Russell discovered the paradox suggested by Burali-Forti's work
Source
report of Bertrand Russell (The Principles of Mathematics [1903]) by Shaughan Lavine - Understanding the Infinite I
Book Reference
Lavine,Shaughan: 'Understanding the Infinite' [Harvard 1994], p.3