Carl Lagoze, Clifford A. Lynch und Ron Jr. Daniel (1996): The Warwick Framework A Container Architecture for Aggregating Sets of Metadata, Digital Library Research Group, Computer Science Department, Cornell University / Office of the President, Division of Library Automation, University of California / Advanced Computing Lab, Los Alamos National Laboratory http://cs-tr.cs.cornell.edu/Dienst/UI/2.0/Describe/ncstrl.cornell/TR96-1593