Allan, Rob J.; Reason, Chris J.C.; Carroll, Penny; Jones, Phil D. (2002). "A reconstruction of Madras (Chennai) mean sea-level pressure using instrumental records from the late 18th and early 19th centuries". International Journal of Climatology22 (9): 1119–1142. doi:10.1002/joc.678. Bibcode: 2002IJCli..22.1119A.
Allan, Rob J.; Reason, Chris J.C.; Carroll, Penny; Jones, Phil D. (2002). "A reconstruction of Madras (Chennai) mean sea-level pressure using instrumental records from the late 18th and early 19th centuries". International Journal of Climatology22 (9): 1119–1142. doi:10.1002/joc.678. Bibcode: 2002IJCli..22.1119A.