@misc{Sylvester_James_Joseph_(1814–1897)_Note_1912,
 author={Sylvester, James Joseph (1814–1897)},
 copyright={Public Domain},
 address={Cambridge},
 howpublished={online},
 year={1912},
 publisher={Cambridge University Press},
 language={eng},
 title={Note on certain difference equations which possess an unique integral},
 type={Text},
 URL={http://rcin.org.pl/Content/122679/PDF/WA35_145318_11371-4_Art61.pdf},
}