Calibration of Smartphones for the use in indoor navigation. - Friedrich Keller; Thomas Willemsen; Harald Sternberg (IPIN, 2012)

Concept for building a smartphone based indoor localization system. - Thomas Willemsen; Friedrich Keller; Harald Sternberg (FUSION, 2014)

Museum of the moment: A cooperation project between metropolitan culture and geomatics. - Thomas Willemsen; Friedrich Keller; Stefanie Lorey; Harald Sternberg (IPIN, 2014)

Concept for building a MEMS based indoor localization system. - Thomas Willemsen; Friedrich Keller; Harald Sternberg (IPIN, 2014)

A topological approach with MEMS in smartphones based on routing-graph. - Thomas Willemsen; Friedrich Keller; Harald Sternberg (IPIN, 2015)

Conditional erosion to estimate routing graph out of floor plans. - Simon Schmitt; Larissa Zech; Thomas Willemsen; Harald Sternberg; Marcel Kyas (IPIN, 2016)

Development of a step counter based on artificial neural networks. - Jan Kupke; Thomas Willemsen; Friedrich Keller; Harald Sternberg (J. Locat. Based Serv., 2016)

Fast routing graph extraction from floor plans. - Simon Schmitt; Larissa Zech; Katinka Wolter; Thomas Willemsen; Harald Sternberg; Marcel Kyas (IPIN, 2017)

3D Indoor Localization using 5G-based Particle Filtering and CAD Plans. - Hossein Shoushtari; Cigdem Askar; Dorian Harder; Thomas Willemsen; Harald Sternberg (IPIN, 2021)