Alheit, Peter. “New Epistemological Challenges in Biographical Research in ‘Postmodernity’”. Dyskursy Młodych Andragogów/Adult Education Discourses, no. 21 (December 31, 2020): 93-103. Accessed September 22, 2021. http://www.dma.wpsnz.uz.zgora.pl/index.php?journal=DMA&page=article&op=view&path[]=567.