Jef Verheyen, • 0461 • Biennale de la critique A/B = B/C, 1962. Painting, matt lacquer on canvas, 130 x 130 cm.
Jef Verheyen, Les positions d'une surface, 1979. Sketch, ink on paper (copy), 1 side.
Jef Verheyen, Galerie Carrefour, Lichtkathedralen, 1967. Sketch, ink on paper (copy), 1 side.
Jef Verheyen, Eonen, 1972. Sketch, ink on paper (copy), 1 side.
Jef Verheyen, Aquarel Venetië (copy), 1977. Sketch, water colour and pencil on paper (copy), 1 side.
Jef Verheyen, De dia-logos met het licht is de reden waarom ik schilder / De ideale stad Urbino, 1977. Sketch, pencil on paper (copy), 2 sides.
Jef Verheyen, Le Pic du Midi / Senanque om 12 uur, 1978. Sketch, pencil on paper, photograph (copy), 1 side.