Hui Luo Zhimei Jiang Byoung Jo Kim N. K. Shankaranarayanan Paul Henry Integrating Wireless LAN and Cellular Data for the Enterprise. 25-33 2003 7 IEEE Internet Computing 2 http://csdl.computer.org/comp/mags/ic/2003/02/w2025abs.htm db/journals/internet/internet7.html#LuoJKSH03