Huaiyu Liu Christian Maciocco Vijay Kesavan Andy Lock Yen Low IEEE 802.21 Assisted Seamless and Energy Efficient Handovers in Mixed Networks. 27-42 2009 MOBILWARE http://dx.doi.org/10.1007/978-3-642-01802-2_3 conf/mobilware/2009 db/conf/mobilware/mobilware2009.html#LiuMKL09