Uljasz, A. (2019). 
	From the Collection of the Bookseller Marian Krzyżanowski as a Source of Research on the Musical and Theatrical Life of Cracow and Warsaw in the 19th and 20th Century. The Annual of the Scientific Library of the PAAS and the PAS in Cracow, 2019, 115-129. doi: https://doi.org/10.4467/25440500RBN.19.007.14150