Numbers 1966-2001, Lawrence Markey, New York, November to December 2001) (1/3); Mel Bochner: Propositions and Process: A Theory of Modern Sculpture (1968-1973), Peter Freeman Inc, New York, May 10 to July 12, 2013 (1/3); Mel Bochner: If the Colour Changes, Fundacio de Serralves, Porto, July to September 2013, ex cat (2/3)