Haak et al. 2015, стр. 4. "Y chromosome haplogroup G2a, common in early central European farmers, almost disappear during the Late Neolithic and Bronze Age, when they are largely replaced by Y haplogroups R1a and R1b..." Haak, Wolfgang; et al. (2. 3. 2015). „Massive migration from the steppe was a source for Indo-European languages in Europe”. Nature. Nature Research. 522 (7555): 207—211. Bibcode:2015Natur.522..207H. PMID25731166. arXiv:1502.02783. doi:10.1038/nature14317.CS1 одржавање: Формат датума (веза)
Haak et al. 2015, стр. 4. "Y chromosome haplogroup G2a, common in early central European farmers, almost disappear during the Late Neolithic and Bronze Age, when they are largely replaced by Y haplogroups R1a and R1b..." Haak, Wolfgang; et al. (2. 3. 2015). „Massive migration from the steppe was a source for Indo-European languages in Europe”. Nature. Nature Research. 522 (7555): 207—211. Bibcode:2015Natur.522..207H. PMID25731166. arXiv:1502.02783. doi:10.1038/nature14317.CS1 одржавање: Формат датума (веза)
Haak et al. 2015, стр. 4. "Y chromosome haplogroup G2a, common in early central European farmers, almost disappear during the Late Neolithic and Bronze Age, when they are largely replaced by Y haplogroups R1a and R1b..." Haak, Wolfgang; et al. (2. 3. 2015). „Massive migration from the steppe was a source for Indo-European languages in Europe”. Nature. Nature Research. 522 (7555): 207—211. Bibcode:2015Natur.522..207H. PMID25731166. arXiv:1502.02783. doi:10.1038/nature14317.CS1 одржавање: Формат датума (веза)
Haak et al. 2015, стр. 4. "Y chromosome haplogroup G2a, common in early central European farmers, almost disappear during the Late Neolithic and Bronze Age, when they are largely replaced by Y haplogroups R1a and R1b..." Haak, Wolfgang; et al. (2. 3. 2015). „Massive migration from the steppe was a source for Indo-European languages in Europe”. Nature. Nature Research. 522 (7555): 207—211. Bibcode:2015Natur.522..207H. PMID25731166. arXiv:1502.02783. doi:10.1038/nature14317.CS1 одржавање: Формат датума (веза)