Mike Bidlo, Daniel Buren, Lucio Fontana, Gaylen Gerber, On Kawara, Yves Klein, Joseph Kosuth, Sherrie Levine, Allan McCollum, Roman Opalka, Ad Reinhardt, Niele Toroni : [exposition], New York, Wolff Gallery, November 27-December 21, 1990, Chicago, Feigen Incorporated, January 11-February 16, 1991 ; Strategies for the Next Painting : Cora Cohen, Gail Fitzgerald, On Kawara, Bill Komoski, Harriet Korman, Jonathan Lasker, Robert Mangold, Brice Marden, Jules Olitski, Carl Ostendarp, Donald Powley, David Reed, Gerhard Richter, David Row : [exposition], New York, Wolff Gallery, January 8-February 9, 1991, Chicago, Feigen Incorporated, February 23-March 30, 1991