Kaplan, 2003: Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century. J. Geophys. Res., 108. 4407, doi: 10.1029/ 2002JD002670.
Rayner, NA, DE Parker, EB Horton, CK Folland, LV Alexander, DP Rowell, EC Kent, and A. Kaplan, 2003: Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century. J. Geophys. Res., 108. 4407, doi: 10.1029/2002JD002670.