[3] Crone's first catalogue raisonné and his PhD thesis still only available in German are regarded as the first European scholarly response to the work of Andy Warhol.
[5] In 1985 Crone, along with James Beck and as honorary founding member Meyer Schapiro, cofounded of the International Associates for Contemporary Art (I.A.C.A).
The artists committee of the I.A.C.A included Georg Baselitz, John Baldessari, Richard Hamilton (artist), Jasper Johns, Donald Judd, Anish Kapoor, Alex Katz, Roy Lichtenstein, Robert Mapplethorpe, Claes Oldenburg, Robert Rauschenberg, Julian Schnabel, Frank Stella and Richard Serra.
Crone led student visits to artists' studios, including those of Roy Lichtenstein, Donald Judd, Richard Serra, Claes Oldenburg, Richard Prince, Roni Horn, Philip Taaffe, Eric Fischl, David Salle, Julian Schnabel, and Peter Halley.
The show presented an early contemporary section (1960 to 1966) featuring artists Donald Judd, Joseph Beuys, Alighiero Boetti, John Chamberlain, Eva Hesse, Robert Ryman, Jasper Johns, Yves Klein and others, with as-yet unexhibited examples of their early work, along with the work of younger artists including Francesco Clemente, Peter Halley, Roni Horn, Anish Kapoor, Imi Knoebel, Tim Rollins & K.O.S., Philip Taaffe, Rosemarie Trockel, and Georg Herold.