Wallert, A., Keune, K., van Iperen, J., & Pedroso, J. (2012). Early Northern Netherlandish Paintings and Gilding Techniques and Cologne: some Parallels. Zeitschrift für Kunsttechnologie und Konservierung, 26(1), 230-240.
Keune, K. (2005). Binding medium, pigments and metal soaps characterised and localised in paint cross-sections. [Thesis, fully internal, Universiteit van Amsterdam].