@article{Oel11, author = {Oelker, S. and Greulich, J. and Keller, L.}, title = {Sichere {\"U}berh{\"o}henrahmen in Seehafenterminals - Verriegelung elektronisch erfasst}, journal = {Hebezeuge F{\"o}rdermittel}, year = {2011}, volume = {}, number = {4}, doi = {}, pages = {192-193} }