@inproceedings{TUW-120807, author = {Retscher, G{\"u}nther}, title = {Ubiquitous Positioning Solutions for Pedestrian Navigation}, booktitle = {5th International Symposium on Mobile Mapping Technology}, year = {2007}, pages = {250--256}, note = {talk: 5th International Symposium on Mobile Mapping Technology, Padua; 2007-05-29 -- 2007-05-31} }