changeset 54703 | 499f92dc6e45 |
parent 54489 | 03ff4d1e6784 |
child 55187 | 6d0d93316daf |
--- a/src/HOL/Rings.thy Mon Dec 09 12:16:52 2013 +0100 +++ b/src/HOL/Rings.thy Mon Dec 09 12:22:23 2013 +0100 @@ -449,7 +449,7 @@ \end{itemize} Most of the used notions can also be looked up in \begin{itemize} - \item \url{http://www.mathworld.com} by Eric Weisstein et. al. + \item @{url "http://www.mathworld.com"} by Eric Weisstein et. al. \item \emph{Algebra I} by van der Waerden, Springer. \end{itemize} *}