Sources:
- Hanna Lech, Jacek Lech, The Prehistoric Flint Mine at Wierzbica 'Zele': A Case Study from Poland in: World Archaeology 16, no. 2 Mines and Quarries (1984), pp. 186-203
- Hanna Lech, Jacek Lech, PL 3 Wierzbica "Zele", Radom Province in: Archaeologia Polona vol. 33:1995, pp. 465-480 - http://www.iaepan.edu.pl/archaeologia-polona/article/518
- http://www.minesdespiennes.org/blog/2015/friday-21-august-2015-lecture-a-marvellous-heritage-the-neolithic-flint-mines-of-poland-at-the-interpretation-centre-of-spiennes/
- George R. Rapp, Archaeomineralogy, Springer Science & Business Media 2013, p. 74