Browning, Sharon R, Brian L Browning, Ying Zhou, Serena Tucci, and Joshua Akey. (2018) 2018. “Analysis of Human Sequence Data Reveals Two Pulses of Archaic Denisovan Admixture.”. Cell 173 (1): 53-61.e9. doi:10.1016/j.cell.2018.02.031.