Seiichiro Tani Masaki Nakanishi Shigeru Yamashita Multi-party Quantum Communication Complexity with Routed Messages. 180-190 2008 COCOON http://dx.doi.org/10.1007/978-3-540-69733-6_19 conf/cocoon/2008 db/conf/cocoon/cocoon2008.html#TaniNY08