M. Wąsik, “The Living Nature with a Bridle an Essay on Monkeys in the Circuses in Vienna in the 19th Century”, 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. 97–112. doi: 10.18778/8142-227-7.06.