Neunheuser, Burkhard, 1903-2003 (Autor Personal)

Eucharistie in Mittelalter und Neuzeit, 1963: title page (Burkhard Neunheuser)

North American Academy of Liturgy website, viewed June 11, 2009 (Burkhard Neuenheuser, born 1903, died November 29, 2003, at the Abbey of Maria Laach in Germany)

German Wikipedia, viewed October 6, 2021 (Burkhard Neuenheuser; Burkhard Gottfried Neunheuser OSB; born December 8, 1903, in Essen; died November 29, 2003, in Andernach; German Benedictine monk of the Abbey of Maria Laach; scholar of liturgics; obtained his doctorate in 1930; taught at the Pontificio Ateneo Sant'Anselmo (Anselmianum) in Rome)