LaTeX.org

Solved . The problem was that the code I copied has been rendered by (La)TeX. As I just found out, TeX has the nice "feature" to render the character ` (ASCII+96, grave accent) as ‘ (U+2018, left single quotation mark). So you cannot just copy code from a document about TeX and expect to have TeX ...

Could you post the latex source of the row and the beginning of the table?
One solution, of course, would be to let bibtex compile the bibliography.

I use this package, which has been suggested by Claudio Beccari in PracTeX Journal .

\makeatletter % not necessary when this code is in a .sty file

% 1st part
\DeclareMathSymbol{\punctcomma}{\mathpunct}{letters}{"3B}
\DeclareMathSymbol{\decimalcomma}{\mathord}{letters}{"3B}


% 2nd part ...