Geelhaar, J. (1999). TightRope. Netz.kunst.
Lua i Stíl Chicago (17ú heag.)Geelhaar, Jens. "TightRope." Netz.kunst 1999.
Lua MLA (8ú heag.)Geelhaar, Jens. "TightRope." Netz.kunst, 1999.
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