Q: Unwanted spacing in bibliography entry / white space in reference EDIT:after fixing the first problem with Harish Kumar's renewcommand, this problem came up:

I have a problem with the "white spaces" which are produced in the bibliography. I've found a couple of answers but i had the mentioned packages in my preamble before. So those answers wouldn't help. i use \usepackage{url} etc.
The strange thing about my problem is, that it only appears in one entry. i checked a dozen times if there are any differences, but i couldn't find anything. I'm not sure if my MWE will help because there is no white space in there.

Here's the link for the download of the .bib file for the entries and .bst for the bibstyle.
https://www.dropbox.com/sh/09rewicos64zek6/AACFnng5VBKi2r7KP8W99ZvDa?dl=0
Here's my MWE (problem about the MWE, it works):
\documentclass{scrreprt}
\usepackage[english, ngerman]{babel}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{natbib}
\usepackage{url}
\setlength{\bibhang}{0mm}
\bibpunct{(}{)}{;}{a}{}{,~}

\begin{document}

\chapter{it doesn't work yet}
blabla \cite{Berger2012}\\
blabla \cite{Klein2013}\\
blabla \cite{Keilig2002}\\
blabla \cite{Jahn2013}\\

\setlength{\bibsep}{2ex plus2ex minus.5ex}
\bibliographystyle{iwbdiss_2} 
\bibliography{literaturverzeichnis}  

\end{document}


A: You can make url to break the lines at places you want by adding these lines to your preamble:
\renewcommand{\UrlBreaks}{\do\a\do\b\do\c\do\d\do\e\do\f\do\g\do\h\do\i\do\j\do‌​\k\do\l\do\m\do\n\do\o\do\p\do\q\do\r\do\s\do\t\do\u\do\v\do\w\do\x\do\y\do\z\do\‌​A\do\B\do\C\do\D\do\E\do\F\do\G\do\H\do\I\do\J\do\K\do\L\do\M\do\N\do\O\do\P\do\Q‌​\do\R\do\S\do\T\do\U\do\V\do\W\do\X\do\Y\do\Z\do\1\do\2\do\3\do\4\do\5\do\6\do\7\‌​do\8\do\9\do\/\do\-\do\_\do\:\do\.}

This should solve the problem of url not being able to split the word Serienproduktion in your url.
