High-Definition X-ray Fluorescence Elemental Mapping of Paintings. - Howard, Daryl L.; de Jonge, Martin D.; Lau, Deborah; Hay, David; Varcoe-Cocks, Michael; Ryan, Chris G.; Kirkham, Robin; Moorhead, Gareth; Paterson, David; Thurrowgood, David (Analytical Chemistry, 2012)