J. . Kukuczka, „Roman Stopa’s Unknown Photographs. Sketching a Portrait of the Khoisan Peoples .......... 89”, w Pioneers of African Studies in Kraków: In memory of Professor Roman Stopa (1895-1995), R. Kłosowicz, Red. Poland: Wydawnictwo Księgarnia Akademicka, 2020, s. 89–110. doi: 10.12797/9788381382359.04.