<Li> Borchert, Till - Holger. Van Eyck . London: Taschen, 2008 . ISBN 3 - 8228 - 5687 - 8 </Li> <Li> Borchert, Till - Holger. Van Eyck to Durer: The Influence of Early Netherlandish painting on European Art, 1430--1530 . London: Thames & Hudson, 2011 . ISBN 978 - 0 - 5210 - 8831 - 2 </Li> <Li> Boorman, Stanley (ed). Studies in the Performance of Late Medieval Music . Cambridge: Cambridge University Press, 1983 . ISBN 0 - 521 - 08831 - 3 </Li> <Li> Burroughs, Bryson . "A Diptych by Hubert van Eyck". The Metropolitan Museum of Art Bulletin, Volume 28, No. 11, Pt 1, 1933 </Li>

The kneeling figures at the lower left and lower right of the painting represent