Berggren, W.A., Hilgen, F.J., Langereis, C.G., Kent, D.V., Obradovich, J.D., Raffi, I., Raymo, M.E., and Shackleton, N.J., 1995. Late Neogene chronology: new perspectives in high-resolution stratigraphy. Geol. Soc. Am. Bull., 107:1272-1287.
Blow, W.H., 1969. Late middle Eocene to Recent planktonic foraminiferal biostratigraphy. In Brönnimann, P., and Renz, H.H. (Eds.), Proc. First Int. Conf. Planktonic Microfossils, Geneva, 1967: Leiden (E.J. Brill), 1:199-422.
Coates, A.G., Jackson, J.B., Collins, L.S., Cronin, T.M., Dowsett, H.J., Bybell, L.M., Jung, P., and Obando, J.A., 1992. Closure of the Isthmus of Panama: the near-shore marine record of Costa Rica and western Panama. Geol. Soc. Am. Bull., 104:814-828.
Farrell, J.W., Raffi, I., Janecek, T.C., Murray, D.W., Levitan, M., Dadey, K.A., Emeis, K.-C., Lyle, M., Flores, J.-A., and Hovan, S., 1995. Late Neogene sedimentation patterns in the eastern equatorial Pacific. In Pisias, N.G., Mayer, L.A., Janecek, T.R., Palmer-Julson, A., and van Andel, T.H. (Eds.), Proc. ODP, Sci. Results, 138: College Station, TX (Ocean Drilling Program), 717-756.
Ibaraki, M., 1992. Planktonic foraminifera of the coastal upwelling area off Peru during the Pleistocene. In Summerhayes, C.P., Prell, W.L., Emeis, K.C. (Eds.), Upwelling Systems: Evolution since the Early Miocene. Geol. Soc. Spec. Publ. London, 64:443-449.
————, 1997. Closing of the Central American seaway and Neogene coastal upwelling along the Pacific coast of South America. Tectonophysics, 281:99-104.
Keigwin, L., 1982a. Isotopic paleoceanography of the Caribbean and East Pacific: role of Panama Uplift in late Neogene time. Science, 217:350-353.
Keigwin, L.D., 1982b. Neogene planktonic foraminifers from Deep Sea Drilling Project Sites 502 and 503. In Prell, W.L., Gardner, J.V., et al., Init. Repts. DSDP, 68: Washington (U.S. Govt. Printing Office), 269-288.
Keller, G., Zenker, C.E., and Stone, S.M., 1989. Late Neogene history of the Pacific-Caribbean gateway. J. South Am. Earth Sci., 2:73-108.
Kimura, G., Silver, E.A., Blum, P., et al., 1997. Proc. ODP, Init. Repts., 170: College Station, TX (Ocean Drilling Program).
Moore, T.C., Jr., Shackleton, N.J., and Pisias, N.G., 1993. Paleoceanography and the diachrony of radiolarian events in the eastern equatorial Pacific. Paleoceanography, 8:567-586.
Saito, T., 1976. Geologic significance of coiling direction in the planktonic foraminifer Pulleniatina. Geology, 4:305-309.