Fritz S.C, Baker P.A, Ekdahl E., Seltzer G.O, Stevens L.R.  2010.  Millennial-scale climate variability during the Last Glacial period in the tropical Andes. Quaternary Science Reviews. 29(7-8):1017-1024.

Baker P.A, Fritz S.C, Burns S.J, Ekdahl E., Rigsby C.A.  2009.  The nature and origin of decadal to millennial scale climate variability in the southern tropics of South America. Past Climate Variability from the Last Glacial Maximum to the Holocene in South America and Surrounding Regions. :301-322.

Baker P.A, Fritz S.C, Garland J., Ekdahl E..  2005.  Holocene hydrologic variation at Lake Titicaca, Bolivia/Peru, and its relationship to North Atlantic climate variation. Journal of Quaternary Science. 20(7-8):655-662.