Jacir Luiz Bordim Tetsuro Ueda Shinsuke Tanaka Delivering the Benefits of Directional Communications for Ad Hoc Networks Through an Efficient Directional MAC Protocol. 461-470 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3124&spage=461 2004 conf/ict/2004 ICT db/conf/ict/ict2004.html#BordimUT04