The blue social bookmark and publication sharing system.
Log in with your username.
I've lost my password.
Log in with your OpenID-Provider.
conf/xp/1981, XP2 Workshop on Relational Database Theory, June 22-24 1981, The Pennsylvania State University, PA, USA, XP2 Workshop on Relational Database Theory, 1981, http://dblp.uni-trier.de/db/conf/xp/xp1981.html