R. Mielczarek, “The Circus a Brief History of the Change of the Meaning of Circus – from a Ritual Experiment to an Experimental Show”, in Not just the Clown and the Tiger. Sketches about Circus Arts, M. Leyko and Z. Snelewska-Stempień, Eds. Poland: Lodz University Press, 2019, pp. 21–42. doi: 10.18778/8142-227-7.02.