Turekian, K K.(1986). Flow rates and reaction rates in the Galapagos Rise spreading center hydrothermal system as inferred from 228 Ra/ 226 Ra in vesicomyid clam shells. Proceedings of the National Academy of Sciences, 83(17), 6241-6244. doi:10.1073/pnas.83.17.6241

Turekian, Karl K. "Flow Rates and Reaction Rates in the Galapagos Rise Spreading Center Hydrothermal System As Inferred From 228 Ra/ 226 Ra in Vesicomyid Clam Shells". Proceedings of the National Academy of Sciences, 83.17 ( 1986 ): 6241-6244.