De coloribus. The meanings of color in the Beatus manuscript (Pierpont-Morgan-Library, 10th century illuminated manuscript of Beatus of Liebana's 'Commentarius in Apocalypsin')
Es. Bolman, De coloribus. The meanings of color in the Beatus manuscript (Pierpont-Morgan-Library, 10th century illuminated manuscript of Beatus of Liebana's 'Commentarius in Apocalypsin'), GESTA, 38(1), 1999, pp. 22