Weiss, T. A.; Jondral, F. K. (2004). "Spectrum pooling: an innovative strategy for the enhancement of spectrum efficiency". IEEE Communications Magazine. 42 (3): S8. doi:10.1109/MCOM.2004.1273768. /wiki/Doi_(identifier)
Friedrich K. Jondral; Ulrich Berthold; Dennis Burgkhardt; Timo A. Weiß. "Dynamic Spectrum Access and Overlay Systems" (PDF). http://www.its.bldrdoc.gov/isart/art10/slides_and_videos10/Jondral_Berthold_Burgkhardt_Weiss_V2.pdf
Friedrich K. Jondral (March 28, 2006). "Cognitive Radio – A Necessity for Spectrum Pooling" (PDF). Universität Karlsruhe Communications Engineering Lab. http://ursi-france.institut-telecom.fr/pages/pages_evenements/journees_scient/docs_journees_2006/Jondral_JS06.pdf