Autonomous satellite state determination by use of two-directional links. - Bernd Eissfeller; T. Zink; R. Wolf; J. Hammesfahr; Achim Hornbostel; J. H. Hahn; P. Tavella (Int. J. Satell. Commun. Netw., 2000)

A time scale for satellite navigation systems: why and how? - J. H. Hahn; P. Tavella (Int. J. Satell. Commun. Netw., 2000)