Grottoli, A. G., Adkins, J. F., Panero, W. R., Reaman, D. M., & Moots, K. (2010). Growth rates, stable oxygen isotopes (δ18O), and strontium (Sr/Ca) composition in two species of Pacific sclerosponges (Acanthocheatetes wellsiandAstrosclera willeyana) withδ18O calibration and application to paleoceanography. Journal of Geophysical Research, 115(C6). doi:10.1029/2009jc005586