Grotowski, Jerzy, Seyferth, Katharina. "Brzezinka: An Introduction by Katharina Seyferth." The Routledge Performance Archive. : Taylor and Francis, 2016. Date Accessed 25 Jan. 2021 https://www.routledgeperformancearchive.com/video/brzezinka-an-introduction-by-katharina-seyferth
Seyferth, K., Grotowski, J.(2016). Brzezinka: An Introduction by Katharina Seyferth. In The Routledge Performance Archive. : Taylor and Francis. Retrieved 25 Jan. 2021, from https://www.routledgeperformancearchive.com/video/brzezinka-an-introduction-by-katharina-seyferth
Seyferth, K., Grotowski, J. 2016, 'Brzezinka: An Introduction by Katharina Seyferth' in Routledge Performance Archive, Taylor and Francis, viewed 25 January 2021, <https://www.routledgeperformancearchive.com/video/brzezinka-an-introduction-by-katharina-seyferth>