ISBN 0-300-12155-5 Harbison, Craig. "Realism and Symbolism in Early FlemishPainting". The Art Bulletin, Volume 66, No. 4, December, 1984 Harbison, Craig
ISBN 0-948462-79-5 Harbison, Craig. "Realism and Symbolism in Early FlemishPainting". The Art Bulletin, Volume 66, No. 4, December, 1984 Jones, Susan Frances