Information & Security: An International Journal
12,
no. 2
(2003):
208-224.
Trakia Journal of Sciences
1,
no. 4
(2003):
8-12.
Information & Security: An International Journal
11
(2003):
136-147.
Information & Security: An International Journal
6
(2001):
122-131.
Information & Security: An International Journal
3
(1999):
132-139.