Shapes and Positions : Carl Andre - Dan Flavin - Donald Judd - Imi Knoebel - Richard Long - Robert Mangold - Gerhard Richter - Robert Ryman - Franz Erhard Walther / - Bois, Yve-Alain; Cooke, Lynne; Brock, Bazon; Foster, Hal; Fuchs, Rudi; Garrels, Gary; Gintz, Claude; Long, Richard; Glozer, Laszlo; Judd, Donald; Lingner, Michael; Walther, Franz Erhard; et al. (Ritter Verlag,, 1992)