@article{aharoni-cohen98,
 author =  "Ehud Aharoni and Reuven Cohen", 
 title =    "Restricted Dynamic {Steiner} Trees for Scalable Multicast in Datagram Networks",
 journal =  "IEEE/ACM Transactions on Networking",
 volume = 6,
 number = 3,
 month =  jun,
 year =   1998,
 pages = "286 -- 297",
 note  = "An earlier version of this paper was presented in Infocom'97"
}