@articleNoé_2001, title=kT/C noise: Covariance matrix calculation of instationary noise in time-varying systems, volume=55, DOI=10.1078/1434-8411-00020, number=2, journal=AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, author=Noé, Reinhold, year=2001, pages=135–139 

@articleNoé_2001, title=kT/C noise: Covariance matrix calculation of instationary noise in time-varying systems, volume=55, DOI=10.1078/1434-8411-00020, number=2, journal=AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, author=Noé, Reinhold, year=2001, pages=135–139