\documentclass[a4paper,11pt]{article}
\usepackage{graphicx}
\usepackage[T1]{fontenc}
\usepackage[left=25mm, right=25mm, top=15mm, bottom=20mm, noheadfoot]{geometry}
\pagenumbering{gobble}
\usepackage{amsmath}

\usepackage{hyperref}
\usepackage{eso-pic, rotating, graphicx}

\AddToShipoutPicture{\put(30,200){\rotatebox{90}{\scalebox{1}{ \href{https://aca2026kosovo.net}{Applications of Computer Algebra (ACA) 2026 Conference.} }}}}

\begin{document}

% Please change the following abstract title and author description.
\title{Abstract title goes here}
\author{
 \underline{Presenting Author}$^{1*}$, Author 2$^{1}$, Author 3$^{2}$ \\
$^{1}$ Affiliation of Presenting Author \\
 email.address@presenting.author \\
 $^{2}$ Affiliation of Second Author
}

% Please do not modify following lines
\date{}
\maketitle

\noindent \textbf{Key words:}
\emph{%
% List your keywords here:
First keyword; 
Second keyword;
third keyword
}
\\\\
% Beginning of your abstract
Please write your abstract text here.

%You can cite articles or books such as \cite{} or \cite{}.


% End of your abstract

% Please add references below. 
%\begin{thebibliography}{00}
 %\end{thebibliography}

\end{document}
