@misc{petersen_ferrybox_systems_2013, 
author={Petersen, W.},
title={FerryBox systems: State-of-the-art in Europe and future development},
year={2013},
howpublished = {conference lecture: Helsinki (FIN);},
note = {Petersen, W.: FerryBox systems: State-of-the-art in Europe and future development. 5th FerryBox Workshop. Helsinki (FIN), 2013.}}