\documentclass[runningheads]{llncs}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amssymb}
\usepackage[colorlinks=true,linkcolor=black,citecolor=black,filecolor=black,urlcolor=black,pdfpagelabels]{hyperref}
\pagestyle{plain} %for submission
\usepackage{isabelle,isabellesym}
\isabellestyle{it}
\isadroptag{theory}
\isafoldtag{proof}
\title{Isabelle document preparation with Springer {\LaTeX} LNCS style}
\author{Makarius Wenzel\inst{1}\orcidID{0000-0002-3753-8280}}
\authorrunning{M. Wenzel}
\institute{Augsburg, Germany \\ \url{https://sketis.net}}
\begin{document}
\maketitle
\begin{abstract}
Isabelle is a formal document preparation system. This example shows how to
use it together with the Springer {\LaTeX} LNCS style. See
\url{https://www.springer.com/gp/computer-science/lncs/conference-proceedings-guidelines}
for further information.
\keywords{Document preparation}
\end{abstract}
\input{session}
\bibliographystyle{splncs04}
\bibliography{root}
\end{document}