Shackleton, N. J.; Blackman, J.; Zimmerman, H.; Kent, D. V.; Hall, M. A.; Roberts, D. G.; Schnitker, D.; Baldauf, Jack G.; Desprairies, A.; Homrighausen, R.; Huddlestun, P.; Keene, J. B.; Kaltenback, A. J.; Krumsiek, K. A. O.; Morton, A. C.; Murray, J. W.; Westberg-Smith, J. (1984): Oxygen isotope calibration of the onset of ice-rafting and history of glaciation in the North Atlantic region. Macmillan Journals, London, United Kingdom, Nature (London), 307 (5952), 620-623, georefid:1984-033709