Hughen, K.A., J.T. Overpeck, S.J. Lehman, M. Kashgarian, J. Southon, L.C. Peterson, R. Alley, and D.M. Sigman. 1998. “Deglacial Changes in Ocean Circulation from an Extended Radiocarbon Calibration”. Nature 391: 65-68. doi:10.1038/34150.