Zoran Popovic, Mental-Spatial Definition of Axioms, Belgrade 1971-72, graphite pen on millimeter-grid-paper, dimension of drawing, 400 x 350 cm. Installation on Zoran Popovic solo exhibition 'Axioms 1971-1973', Student Cultural Center Gallery, Belgrade, October 1983
Zoran Popovic, Mentalno-prostorna definicija aksioma, Beograd, 1971-72, olovka na milimetarskom papiru, dimenzije crteza, 400 x 350 cm. Postavka na solo izlozbi Zorana Popovica 'Axiomi 1971-1973', Galerija SKC, Beograd, oktobar 1983.