K. Wasiak, “Fighting to Swear the Warsaw Confederation from May 17th 1573 to April 22th 1574 in the Light of ‘Diariusz poselstwa polskiego do Francji’ to Henry III in 1573”, in Vade Nobiscum, tom XXII/2021: Studia z wieków dawnych, K. Gryglewski, J. Kuliś, J. Pisarski, and C. Cyprian, Eds. Poland: Lodz University Press, 2021, pp. 73–89. doi: 10.18778/8220-726-2.06.