\bib{1928/lehmer}
\yr 1928
\by Derrick H. Lehmer
\paper The mechanical combination of linear forms
\jour American Mathematical Monthly
\issn 0002--9890
\vol 35
\pages 114--121
\url http://links.jstor.org/sici?sici=0002-9890(192803)35:3<114:TMCOLF>2.0.CO;2-Z
\endref