کتاب های Friis J. A.
Conflict in Cyber Space: Theoretical, Strategic and Legal Pespectives
Karsten Friis; Jens Ringsmose, 2016
East German foreign intelligence: myth, reality and controversy /
edited by Thomas Wegener Friis Kristie Macrakis and Helmut Müller-Enbergs., 2010.
Reviews of Physiology, Biochemistry and Pharmacology, 119
H. Diringer, R. Friis (auth.), 1992
