N.G. Kipp(1975). New transfer function for estimating past sea-surface
conditions from sea-bed distribution of planktonic foraminiferal assemblages
in the North Atlantic. Memoir 145, Geological Society of America.
W.F. Ruddiman, L.K. Glover(1975). Subpolar North Atlantic circulation at 9,300
yr BP: Faunal evidence. Quaternary Research 5, 361-389.
W.F. Ruddiman, A. Esmay(1986). A streamlined foraminiferal transfer function
for the subpolar North Atlantic. Initial Reports of the DSDP, vol XCIV.