- HyperMusic: Leonin and Perotin - Biographical material on the two composers and their relationship with each other. Includes sample music in MIDI audio format.
www.hypermusic.ca/comp/leonin.html
- Léonin [Leoninus] (Paris, c. 1135 - Paris, c. 1201) - Entry from the Oxford Dictionary of Music at xrefer.
www.xrefer.com/entry/241926
- Léonin [Leonius, Leo, Leoninus] - Biography, major works and influence, and links to information on medieval polyphony.
www.hoasm.org/IIC/Leonin.html
- Leonin - Biographical material, musicological study, and link to discussion of organum polyphony.
www.ced.appstate.edu/intercollege/3850/studwork/medieval/guide/comp/leonin.htm
- Leonin, (c. 1135 - c. 1201), France - Biographical data, bibliography, major works, influences on Western music, and links.
stevenestrella.com/composers/composerfiles/leonin1201.html
- Magister Leoninus (? 1163 - 1190) - Karadar dictionary entry with life, influence, and related composers.
www.karadar.net/Dictionary/leoninus.html
- Magister Leoninus and his Magnus Liber Organi - Biographical material, suggested reading, timeline, key works, recommended recordings, and historical and societal context from Heart's Ease.
www.hearts-ease.org/cgi-bin/conservatory_index.cgi?ID=6
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