Gisborne, Mark (2012-10-30). "BETWEEN PERCEPTION AND THE SIGN". Art in Berlin by german artist Eberhard Bosslet. Retrieved 2024-07-20.
britannica.com
Britannica Online: [1]"20th-century art form intended to involve or encompass the spectators rather than merely to face them; the form developed as part of a larger artistic current that sought to break down the historical dichotomy between life and art."
