His scholarship was exceptionally broad, covering the notation of early Byzantine music, the ars nova, Renaissance motets, Haydn, and Verdi.
•
Retiring from teaching in 1966 he moved to Grottaferrata, Italy, continuing his research on Byzantine music at the Abbey of Santa Maria (Badia Greca) there.
Oliver Cromwell | Oliver Stone | Oliver! | Oliver Goldsmith | Oliver | Jamie Oliver | Oliver Wendell Holmes, Jr. | Oliver Sacks | Oliver Wendell Holmes, Sr. | Oliver Twist | Oliver Wendell Holmes | Oliver Hardy | Oliver Reed | Oliver North | Oliver Nelson | Oliver Hazard Perry | Oliver Lake | Oliver Heaviside | Oliver O. Howard | Oliver Tambo | Oliver Lodge | Oliver Letwin | Oliver Kahn | Oliver Knussen | Paul Oliver | Oliver Tompsett | Oliver Pocher | Damien Oliver | Susan Oliver | Oliver Dragojević |