Knüsel, S. Dating of two nearby ice cores from the Illimani, Bolivia (англ.) // Journal of Geophysical Research : journal. — 2003. — Vol. 108, no. D6. — P. 4181. — doi:10.1029/2001JD002028. — Bibcode: 2003JGRD..108.4181K.
D'Arrigo, Rosanne; Frank, David; Jacoby, Gordon; Pederson, Neil. Spatial Response to Major Volcanic Events in or about AD 536, 934 and 1258: Frost Rings and Other Dendrochronological Evidence from Mongolia and Northern Siberia: Comment on R. B. Stothers, ‘Volcanic Dry Fogs, Climate Cooling, and Plague Pandemics in Europe and the Middle East’ (Climatic Change, 42, 1999) (англ.) // Climatic Change : journal. — 2001. — Vol. 49, no. 1/2. — P. 243. — doi:10.1023/A:1010727122905.
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Knüsel, S. Dating of two nearby ice cores from the Illimani, Bolivia (англ.) // Journal of Geophysical Research : journal. — 2003. — Vol. 108, no. D6. — P. 4181. — doi:10.1029/2001JD002028. — Bibcode: 2003JGRD..108.4181K.
