Boutron, Claude (20 December 1980). "Respective influence of global pollution and volcanic eruptions on the past variations of the trace metals content of Antarctic snows since 1880s". Journal of Geophysical Research: Oceans. 85 (C12): 7431. Bibcode:1980JGR....85.7426B. doi:10.1029/JC085iC12p07426.
Boutron, Claude (20 December 1980). "Respective influence of global pollution and volcanic eruptions on the past variations of the trace metals content of Antarctic snows since 1880s". Journal of Geophysical Research: Oceans. 85 (C12): 7431. Bibcode:1980JGR....85.7426B. doi:10.1029/JC085iC12p07426.