TY  - BOOK
AU  - Hersent,Olivier
AU  - Gurle,David
AU  - Petit,Jean-Pierre
TI  - IP telephony: packet-based multimedia communications systems 
SN  - 0201619105
PY  - 2000///
CY  - Harlow
PB  - Addison-Wesley
KW  - Telefonia internetowa
KW  - kaba
ER  -