Rubboli, D. Ridi Pagliaccio, 1985: t.p. (Ruggero Leoncavallo, musician) ill. 4, etc. On facsim. of his birth certificate (b. in Naples 4/23/1857; received names Ruggiero followed by 9 others; in note below facsim.: R. Leoncavallo always claimed to have been born 3/8/1858)
Encicl. ital. (Leoncavallo, Ruggero; b. in Naples 3/18/1858; d. 8/9/1919)