TY  - JOUR
A1  - Ritz, Thomas
T1  - Personalized information services : an electronic information commodity and its production
JF  - International Journal of E-Business Strategy Management
Y1  - 2000
SN  - 1467-0305
VL  - 2
IS  - 2
ER  - 
TY  - JOUR
A1  - Ritz, Thomas
T1  - Information Channels
JF  - Information Technology. Nr. 52 (2000), H. 08. Mai 2000
Y1  - 2000
SP  - 15
EP  - 15
ER  -