M. Janus, “Oh What a Circus, oh what a Show. Puppets in the Circus and the Circus with Puppets”, 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. 125–137. doi: 10.18778/8142-227-7.08.