Dingyi Pei Yuqiang Li Yejing Wang Reihaneh Safavi-Naini Characterization of Optimal Authentication Codes with Arbitration. 303-313 http://link.springer.de/link/service/series/0558/bibs/1587/15870303.htm 1999 conf/acisp/1999 ACISP db/conf/acisp/acisp1999.html#PeiLWS99