1. Bureau International des Poids et Mesures1 Circ. T 26-29 Sèvres 1990
2. International Radio Consultative Committee (CCIR) World atlas of ground conductivities 75 Dubrovnik, Yugoslavia 1986
3. Improvement of the GPS time comparisons by simultaneous relative positioning of the receiver antennas;Guinot;Bull. Geod.,1989
4. Hara , T. K. Horiai K.-H. Sato M. Fujishita S. Sakai K. Iwadate K. Asari Measurement of the propagation time of LORAN-C signals 1988
5. Estimation of the land effect on LORAN-C wave propagtion and correction chart, Kokai;Ono;Navigation,1985