@article{TUW-207993, author = {Retscher, G{\"u}nther}, title = {Preface to the Special Issue on Multi-sensor Systems in Engineering Geodesy and Navigation}, journal = {Journal of Applied Geodesy}, year = {2012}, volume = {6}, number = {1}, pages = {1--2}, doi = {10.1515/jag-2012-0005}, note = {invited} }