Briffa, K. R.; Jones, P. D.; Schweingruber, F. H.; Osborn, T. J. (1998). "Influence of volcanic eruptions on Northern Hemisphere summer temperature over 600 years". Nature. 393 (6684): 450–455. Bibcode:1998Natur.393..450B. doi:10.1038/30943. S2CID4392636.
Briffa, K. R.; Jones, P. D.; Schweingruber, F. H.; Osborn, T. J. (1998). "Influence of volcanic eruptions on Northern Hemisphere summer temperature over 600 years". Nature. 393 (6684): 450–455. Bibcode:1998Natur.393..450B. doi:10.1038/30943. S2CID4392636.
Briffa, K. R.; Jones, P. D.; Schweingruber, F. H.; Osborn, T. J. (1998). "Influence of volcanic eruptions on Northern Hemisphere summer temperature over 600 years". Nature. 393 (6684): 450–455. Bibcode:1998Natur.393..450B. doi:10.1038/30943. S2CID4392636.