deletions | additions       diff --git a/conclusions.tex b/conclusions.tex  index feb1736..7aee3a4 100644  --- a/conclusions.tex  +++ b/conclusions.tex 
...
\ifx\noauthorea\undefined  \paragraph{Acknowledgements.}  We wish to thank Jan Vitek, Petr Maj,and  Karl Millar Millar, and Oli Fl{\"u}ckiger  for many enlightening discussions. We are especially grateful to Jan for sparking our interest in this exciting line of research. % during a pleasant visit at Purdue University and for interesting conversations in many other occasions. \fi