Avgikos, J. (2007). Sigmar Polke: Michael Werner, New York. Artforum.
Lua i Stíl Chicago (17ú heag.)Avgikos, Jan. "Sigmar Polke: Michael Werner, New York." Artforum 2007.
Lua MLA (8ú heag.)Avgikos, Jan. "Sigmar Polke: Michael Werner, New York." Artforum, 2007.
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