My problem is almost the same as this one: Normal footnote in epigraph command
In my case, I don't want the basic display of citation.
When I use \footcitetext{REF}, the REF being a reference in my bibliography, for the moment it shows NAME_OF_THE_AUTHOR YEAR. I'd like to have NAME_OF_THE_AUTHOR, FIRST_NAME_OF_THE_AUTHOR: TITLE (YEAR)
Actually I'd like to use my \citehyperref command, defined like this and working when used outside of an epigraph:
\DeclareCiteCommand{\citehyperref}
{\usebibmacro{prenote}}
{\usebibmacro{citeindex}%
\bibhyperref{\usebibmacro{title}\printtext[parens]{\printfield{year}}}}
{\multicitedelim}
{\usebibmacro{postnote}}
\DeclareFieldFormat[article,book,inbook,incollection,inproceedings,patent,thesis,unpublished]{title}{\printnames{author}\addcolon\space\textit{#1}\isdot}
Here is an example of my problem: https://www.latex4technics.com/?note=3NJ4