Robert B. Dunbar

Pronounced occurrence of long-chain alkenones and dinosterol in a 25,000-year lipid molecular fossil record from Lake Titicaca, South America

R. Dunbar, J. M. Moldowan, H. Rowe, 2005 .

The history of South American tropical precipitation for the past 25,000 years.

Geoffrey O. Seltzer, R. Dunbar, P. A. Baker, 2001, Science.