The Donald Judd retrospective opened at Tate Modern in February. It is the first major survey of the artist's career since 1988. frieze asked the following artists, historians, critics and designers for their responses to the show: James Meyer, Lynne Cooke, Mary Heilmann, Mark Godfrey, Richard Wentworth, Liam Gillick, David Musgrave, Jasper Morrison and Deyan Sudjc.

Michael Fullerton

Pierre Bismuth

The appearance of thinking

Milena Dragicevic

Cedric Price

The first performance of Brian Wilson's legendary, lost album Smile

Andy Warhol's Time Capsules: art or artefact?

An interview with Ingo Maurer

Rachel Cohen' new book on artistic and literary collaborations

Exhibited for the first time in Frankfurt, Stanley Kubrick's archive reveals the working methods of a director obsessed with detail and veracity.

I've just visited Nantes, Paris and Brussels to see some work in the flesh