found: Painted illusions, c2000:t.p. (Cornelius Gijsbrechts)
found: Union list of artists names, July 11, 2003(Gysbrechts, Cornelis Norbertus (Flemish painter, active 1659-1672))
found: Grove dict. of art, July 11, 2003(under illusionism: Dutchman Cornelis Gysbrechts (fl. later 17th century); under still-life: Cornelis N. Gijsbrechts (fl. 1660))
found: Artcyclopedia Web site, July 11, 2003(Cornelius Gijsbrechts; [Flemish Painter, ca. 1630-1675]; Also known as: Cornelius Gysbrechts)
found: KB Web OPAC, July 11, 2003(Gijsbrechts, Cornelius Norbertus, fl. 1659-1675)