My brain isn't working tonight, but I believe the researcher's name is
Blackburn, and you can search the LactNet archives under "sweat" or
"Blackburn" for references to his work.  He is an evolutionary biologist who
studies the evolution of mammary glands in early reptile/mammals -- not a
lactation person per se.

Katherine A. Dettwyler, Ph.D.
Associate Professor of Anthropology and Nutrition
Texas A&M University