Heartney, E. (1997). Dark Laughter: In Dennis Oppenheim's sculptures and installations from the last nine years, surveyed in a recent show in Portugal. Art in America.

Heartney, Eleanor. "Dark Laughter: In Dennis Oppenheim's Sculptures and Installations from the Last Nine Years, Surveyed in a Recent Show in Portugal." Art in America 1997.

Heartney, Eleanor. "Dark Laughter: In Dennis Oppenheim's Sculptures and Installations from the Last Nine Years, Surveyed in a Recent Show in Portugal." Art in America, 1997.