Olson, R. J. M.; Pasachoff, J. M. (1992). "The 1816 Solar Eclipse and the Comet 1811I in Linnell's Astronomical Album". Journal for the History of Astronomy23: 121. doi:10.1177/002182869202300204. Bibcode: 1992JHA....23..121O.
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Olson, R. J. M.; Pasachoff, J. M. (1992). "The 1816 Solar Eclipse and the Comet 1811I in Linnell's Astronomical Album". Journal for the History of Astronomy23: 121. doi:10.1177/002182869202300204. Bibcode: 1992JHA....23..121O.