T. Ohlemüller, F. Winkler, and E. Graß
Radio Localization in OFDM networks using the Round Trip Phase
Positioning, Navigation and Communication 2010 (WPNC'10), IEEE, 2010
RIS, BibTex

O. Schrape, F. Winkler, and E. Graß
An All-Digital Phase-Locked Loop with High Resolution for Local On-Chip Clock Synthesis
Springer-Verlag, 2011, ISBN 9783642177514
ISBN, RIS, BibTex