I'm using the IEEEannot.bst class to do bibliographic surveys and wanted to insert a field into the bibtex file, such as @article attribute, and then display that field in the PDF references. I am very beginer in LaTex syntax and I do not know exactly what I need to change to do this. I've already made a change to a function that worked, but I'm not getting it.

This was a change I made that worked, the goal is to put the annotated text in bold:

Change that worked: Before

FUNCTION {format.annotate}
{ annote empty$
    { "" }
    {  " "
        annote
        * "" *
    }
    if$
}

Change that worked: Then

FUNCTION {format.annotate}
{ annote empty$
    { "" }
    { 
        " \textbf{ "
        annote
        * "}" *
    }
    if$
}

The function format.annotate is called later in the code, in a section like the following:

FUNCTION {article}
{ 
  % Code here...
  format.annotate write$
  % Code here...
}

Change I want now

To do what I want, I created a new function and called it as in the above code:

FUNCTION {format.link}
{ doi empty$
    { "" }
    {
        ""
        doi
        * "" *
    }
}

In the call I'm not sure how to do it, but I did something like this:     FUNCTION {article}     {       % Code here ...       format.annotate write $       format.link doi       % Code here ...     }

But nothing has changed. Note: annote is a property of @article , in the bibtex file, as well as doi . Even when I call the doi property inside a method that works nothing happens. I do not know the LaTex syntax very well, so would anyone know where the error is? how could I get a property of bibtex and display it in the document?