Reyes, Alberto V., Jensen, Britta J. L., Zazula, Grant D., Ager, Thomas A., Kuzmina, Svetlana, La Farge, Catherine, and Froese, Duane G., 2010, A late–Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska: Quaternary Science Reviews, v. 29, no. 5, p. 801-811.