Jaffrés , Jasmine B.D., Shields, Graham A., and Wallmann, Klaus (2007) The oxygen isotope evolution of seawater: a critical review of a long-standing controversy and an improved geological water cycle model for the past 3.4 billion years. Earth-Science Reviews, 83 (1-2). pp. 83-122.

Kasting, James F., Howard, M. Tazewell, Wallmann, Klaus, Veizer, Jan, Shields, Graham, and Jaffrés, Jasmine (2006) Paleoclimates, ocean depth, and the oxygen isotopic composition of seawater. Earth and Planetary Science Letters, 252 (1). pp. 82-93.