%0 Generic %A Fathi, Hanane. %E Chakraborty, Shyam. %E Prasad, Ramjee. %@ 9781402066313 %T Voice over IP in Wireless Heterogeneous Networks Signalling, Mobility, and Security / %U https://ezaccess.libraries.psu.edu/login?url=http://dx.doi.org/10.1007/978-1-4020-6631-3