C. Falgueres, J.-J. Bahain, Y. Yokoyama, J. L. Arsuaga, J. M. B. de Castro, E. Carbonell, J. L. Bischoff, and J.-M. Dolo. Earliest humans in Europe: the age of TD6 Gran Dolina, Atapuerca, Spain. J. Hum. Evol., volume 37, issue 3, pages 343-352, 1999.