%% --------------- Bibliography setup --------------------------------------

 \usepackage{csquotes}	% recommended for biblatex

 %\usepackage[babel,german=quotes]{csquotes}	% utf8-change ??

 %utf8-change

 %Note: biblatex with bibtex backend is frozen at version 1.7.

 \usepackage[style=numeric-comp,backend=biber,bibencoding=auto]{biblatex}[2013/01/10] %utf8-change

 \ExecuteBibliographyOptions{bibwarn=true,sortcites=true,defernumbers=true,isbn=false,doi=false,backref=true}

 %% titles of reference section + 3 categories of references:

 \newcommand{\@bibtitle}{Quellenverzeichnis}

 \newcommand{\@bibtitleLiteratur}{Literatur}

 \newcommand{\@bibtitleAvmedia}{Filme und audiovisuelle Medien}

 \newcommand{\@bibtitleOnline}{Online-Quellen}	

 \ifthenelse{\equal{\hgb@MainLanguage}{english}}{%

 	\renewcommand{\@bibtitle}{References}

 	\renewcommand{\@bibtitleLiteratur}{Literature}

 	\renewcommand{\@bibtitleAvmedia}{Films and audio-visual media}

 	\renewcommand{\@bibtitleOnline}{Online sources}	

 }{}

 \defbibfilter{literature}{

 	not ( type=movie or type=video or type=music or type=audio or 

 				type=online or type=electronic or type=www or type=software )}

 \defbibfilter{avmedia}{%

 	( type=movie or type=video or type=music or type=audio or type=software )}

 \defbibfilter{online}{%

 	( type=online or type=electronic or type=www )}

 \defbibheading{noheader}[]{}	% 'none' should be defined but isn't

 % utf8-change (deactivated):

 % German format in biblatex is flawed: it adds wrong spaces and prohibits

 % line breaking within date strings. Corrected by Wilbur as follows.

 % Taken from german.lbx: replaced \thinspace by breaking zero space \hskip0pt 

 %\DefineBibliographyExtras{ngerman}{% 

   %\def\mkbibdatelong#1#2#3{%

     %\iffieldundef{#3}

       %{\hskip0pt}

       %{\mkbibordinal{\thefield{#3}}%

        %\iffieldundef{#2}{}{\space}}%	%was: \nobreakspace

     %\iffieldundef{#2}

       %{\hskip0pt}

       %{\mkbibmonth{\thefield{#2}}%

        %\iffieldundef{#1}{\hskip0pt}{\space}}%

     %\stripzeros{\thefield{#1}}}%

 %%

   %\def\mkbibdateshort#1#2#3{%

     %\iffieldundef{#3}

       %{\hskip0pt}

       %{\mkdatezeros{\thefield{#3}}\adddot

        %\iffieldundef{#2}{}{\hskip0pt}}%

     %\iffieldundef{#2}

       %{\hskip0pt}

       %{\mkdatezeros{\thefield{#2}}%

        %\iffieldundef{#1}

 	 %{\hskip0pt}

 	 %{\iffieldundef{#3}{/}{\adddot\hskip0pt}}}%

     %\mkdatezeros{\thefield{#1}}}%

 %}

 % utf8-change (deactivated):

 % Similar problem with badly braking date strings in english.

 % Taken from english.lbx: added breaking zero space \hskip0pt to /

 %\DefineBibliographyExtras{english}{% 

   %\def\mkbibdatelong#1#2#3{%

     %\iffieldundef{#2}

       %{}

       %{\mkbibmonth{\thefield{#2}}%

        %\iffieldundef{#3}

          %{\iffieldundef{#1}{}{\space}}

 	 %{\space}}%	%was: \nobreakspace

     %\iffieldundef{#3}

       %{}

       %{\stripzeros{\thefield{#3}}%

        %\iffieldundef{#1}{}{,\space}}%

     %\stripzeros{\thefield{#1}}}%

 %%

   %\def\mkbibdateshort#1#2#3{%

     %\iffieldundef{#2}

       %{}

       %{\mkdatezeros{\thefield{#2}}%

        %\iffieldundef{#3}

          %{\iffieldundef{#1}{}{/{\hskip0pt}}}

 	 %{/{\hskip0pt}}}%

     %\iffieldundef{#3}

       %{}

       %{\mkdatezeros{\thefield{#3}}%

        %\iffieldundef{#1}{}{/{\hskip0pt}}}%

     %\mkdatezeros{\thefield{#1}}}%

 %}

 %This is only a wrapper to \addbibresource to allow the use

 %of the classic bibtex-workflow in the future.

 \newcommand{\AddBibFile}[1]{

 	\addbibresource{#1}%

 }

 %See http://www.jr-x.de/publikationen/latex/tipps/zeilenumbruch.html

 \newenvironment{bibhyphenation}% 

 	{\hyphenpenalty=20%		(50)

 	 \tolerance=9999%				(200)

 	 \exhyphenpenalty=0%		(50)

 	 \linepenalty=0%				(10)

 	 \setlength{\emergencystretch}{3em}}%

 	{}

 % Currently the only public macro:

 % \MakeBibliography ... creates a reference section split subsections (default)

 % \MakeBibliography[nosplit] ... creates a one-piece reference section

 \newcommand{\MakeBibliography}[1][]{

 	% opt. arg (#1): optional argument "nosplit" to get a 1-piece bibliography

 	\clearpage

 	\ifthenelse{\equal{#1}{nosplit}}%

 		{% create a single bibliography with all entries:

 			%\printbibheading[heading=bibintoc,title={#2}]

 			\printbibheading[heading=bibintoc,title={\@bibtitle}]

 			\begin{bibhyphenation}	

 			\printbibliography[heading=noheader]

 			\end{bibhyphenation}

 		}

 		{% split the bibliography using the predefined categories:

 			%\printbibheading[heading=bibintoc,title={#2}]

 			\printbibheading[heading=bibintoc,title={\@bibtitle}]

 			\begin{bibhyphenation}

 			\printbibliography[filter=literature,heading=subbibintoc,title={\@bibtitleLiteratur}]

 			\printbibliography[filter=avmedia,heading=subbibintoc,title={\@bibtitleAvmedia}]

 			\printbibliography[filter=online,heading=subbibintoc,title={\@bibtitleOnline}]

 			\end{bibhyphenation}

 		}%

 }