@Manual{ref_1,
  author = 	 {Fossen, T.I.},
  title = 	 {Marine Control Systems},
  school =	{Norwegian University of Science and Technology},
  publisher =	{Marine Cybernetics},
  year =	{2002}
}

@Article{ref_5,
  author = 	 {Lionel, L. and Soetanto, D.},
  title = 	 {Nonlinear path-following control of an AUV},
  journal = 	 {Science Direct, Elsevier},
  year = 	 {2006},

}

@PhdThesis{ref_6,
  author = 	 {Bibuli, M.},
  title = 	 {Advanced guidance techiques and mission Cotrol Architectures Development Towards Marine Robotic Systems Enhacement},
  school = 	 {University of Genova, Faculty of Engineering},
  year = 	 {2010},
  
}
