Se funziona mi devi una cena.!!!:D 😀 😀
A me funge. Prova.
Per prima cosa cancella tutti i file ausiliari aux, toc, bbl…
E poi scrivi
`
\makeatletter
\renewenvironment{thebibliography}[1]
{\chapter*{\bibname}%
\@mkboth{\MakeUppercase{References}}{\MakeUppercase{References}}%
\list{\@biblabel{\@arabic\c@enumiv}}%
{\settowidth\labelwidth{\@biblabel{#1}}%
\leftmargin\labelwidth
\advance\leftmargin\labelsep
\@openbib@code
\usecounter{enumiv}%
\let\p@enumiv\@empty
\renewcommand\theenumiv{\@arabic\c@enumiv}}%
\sloppy
\clubpenalty4000
\@clubpenalty \clubpenalty
\widowpenalty4000%
\sfcode`\.\@m}
{\def\@noitemerr
{\@latex@warning{Empty `thebibliography' environment}}%
\endlist}
\makeatother
\usepackage[sectionbib]{bibunits}
usepackage[sectionbib,sort]{natbib}
`
Mentre nella biblio scrivi
`
\section{References}
\renewcommand*{\bibname}{}
\vspace{-2\baselineskip}
\putbib[bibliocap]`
Ciao
Andrea