Alan Kaplan John V. E. Ridgway Bradley R. Schmerl Krishnan Sridhar Jack C. Wileden Toward Pure Polylingual Persistence. 70-83 2000 conf/pos/2000 POS http://link.springer.de/link/service/series/0558/bibs/2135/21350070.htm db/conf/pos/pos2000.html#KaplanRSSW00