\begin{thebibliography}{3}
\providecommand{\natexlab}[1]{#1}
\providecommand{\url}[1]{\texttt{#1}}
\expandafter\ifx\csname urlstyle\endcsname\relax
  \providecommand{\doi}[1]{doi: #1}\else
  \providecommand{\doi}{doi: \begingroup \urlstyle{rm}\Url}\fi

\bibitem[Fossen(2002)]{ref_1}
T.I. Fossen.
\newblock \emph{Marine Control Systems}.
\newblock Norwegian University of Science and Technology, 2002.

\bibitem[Mišković(2010)]{ref_2}
N.~Mišković.
\newblock \emph{Use of self-oscillations in guidance and control of marine
  vessels}.
\newblock Doktorska disertacija, University of Zagreb Faculty of electrical
  engineering and computing, 2010.

\bibitem[Vukić i Kuljača(2003)]{ref_3}
Z.~Vukić i LJ. Kuljača.
\newblock \emph{Nonlinear Control Systems}.
\newblock University of Zagreb, Faculty of electrical engineering and
  computing, 2003.

\end{thebibliography}
