Martin, E. E.; Shackleton, N. J.; Zachos, J. C.; Flower, B. P. (1999): Orbitally-tuned Sr isotope chemostratigraphy for the late middle to late Miocene. American Geophysical Union, Washington, DC, United States, Paleoceanography, 14 (1), 74-83, georefid:1999-067417