Tveten U. Worldwide status of long range atmospheric transportation models for use in emergency situations / U.Tveten, 1992. - 13 p. - Текст : непосредственный.
Tveten U. Cosmic radiation and airline pilots.Exposure patterns of Norwegian SAS-pilots 1960 to 1994 / U.Tveten, 1997. - 106 p. - Текст : непосредственный.
Tveten U. Cosmic radiation and airline pilots.Exposure patterns of norwegian pilots flying aircraft not used by sas / U.Tveten, 1997. - 34 p. - Текст : непосредственный.