Davies, S., & Davies, S. (2004). Were there two Borrobol Tephras during the early Lateglacial period: Implications for tephrochronology? Quaternary Science Reviews, 23(5-6), pp. 581-589. doi:10.1016/j.quascirev.2003.11.006

Davies, Siwan, and S. Davies. "Were There Two Borrobol Tephras During the Early Lateglacial Period: Implications for Tephrochronology?" Quaternary Science Reviews 23, no. 5-6 (2004): 581-589.

Davies, Siwan, and S. Davies. "Were There Two Borrobol Tephras During the Early Lateglacial Period: Implications for Tephrochronology?" Quaternary Science Reviews 23.5-6 (2004): 581-589.