References
Haak, W., G. Brandt, H.N. de Jong, C. Meyer, R. Ganslmeier, V. Heyd, C. Hawkeswordth, A.W.G. Pike, H. Meller & K.W. Alt 2008, Ancient DNA, Strontium isotopes, and osteological analyses shed light on social and kinship organization of the Later Stone Age, PNAS, 105/27, 18226-18231.