Snímek odkrytého masového hrobu v Koszycích, foto H.Schroeder et al., Unraveling ancestry, kinship, and violence in a Late Neolithic mass grave, PNAS May 28, 2019 116 (22) 10705-10710, CC BY-NC-ND 4.0, https://creativecommons.org/licenses/by-nc-nd/4.0/.