Design and Implementation of KARDAMOM - A Set-oriented Data Flow Database Machine. - Günter von Bültzingsloewen; Cirano Iochpe; Rolf-Peter Liedtke; Ralf Kramer; Michael Schryro; Klaus R. Dittrich; Peter C. Lockemann (IWDM, 1989)

Offene Probleme der Steuerung der Anfrageverarbeitung in parallelen Datenbanksystemen. - Ralf Kramer (Grundlagen von Datenbanken, 1990)

Zur Bearbeitung komplexer Anfragen im Mehrbenutzerbetrieb auf Shared-Nothing-Datenbanksystemen. - Günter von Bültzingsloewen; Ralf Kramer; Rolf-Peter Liedtke; Michael Schryro (Transputer-Anwender-Treffen, 1990)

Steuerung der Anfragebearbeitung in parallelen Datenbanksystemen. - Ralf Kramer (1992)

PANDA: A Testbed for Investigating Strategies for Parallel Query Execution (Synopsis). - Günter von Bültzingsloewen; Ralf Kramer; Michael Schryro (PDIS, 1993)

Bericht von der 2nd International Conference on Parallel and Distributed Information Systems (PDIS) in San Diego, California, USA, 20.-22. Januar 1993. - Günter von Bültzingsloewen; Ralf Kramer (Datenbank Rundbr., 1993)

Steuerung der Anfragebearbeitung in parallelen Datenbanksystemen. - Ralf Kramer (GI Datenbank Rundbrief, 1993)

Limits Database for an Environmental Information System - A Fuzzy Set-based Querying Approach. - Ralf Kramer; Horst Spandl (ADB, 1994)

Unscharfe Anfragen an eine Grenzwert-Datenbank. - Ralf Kramer (BTW, 1995)

Nutzung des Umweltdatenkatalogs in Weitverkehrsnetzen. - Ralf Kramer (Integration von Umweltdaten, 1995)

Metadatenzugriff in Weitverkehrsnetzen: Eine Realisierung am Beispiel des Umweltdatenkatalogs UDK. - Ralf Kramer; Horst Spandl (GI Jahrestagung, 1995)

A Knowledge-Based System Approach for Scientific Data Analysis and the Notion of Metadata. - Epaminondas Kapetanios; Ralf Kramer (IEEE Symposium on Mass Storage Systems, 1995)

Active Information Delivery in a CORBA-based Distributed Information System. - Günter von Bültzingsloewen; Arne Koschel; Ralf Kramer (CoopIS, 1996)

Umweltdaten im Internet - Aufbau eines öffentlichen WWW-Servers. - Ralf Kramer; Ralf Nikolai; Horst Spandl (EMISA, 1996)

Accessing Multilingual, Heterogeneous Data Sources in Wide Area Networks - Requirements and Approach. - Ralf Kramer; Ralf Nikolai (FQAS, 1996)

Poster on Accept Heterogeneity: An Event Monitoring Service for CORBA-based Heterogeneous Information Systems. - Günter von Bültzingsloewen; Arne Koschel; Ralf Kramer (CoopIS, 1997)

Interoperability Issues of the European Catalogue of Data Sources (CDS). - Ralf Kramer; Ralf Nikolai; Claudia Rolker; Sigfus Bjarnason; Stefan Jensen (MD, 1997)

Databases on the Web: Technologies for Federation Architectures and Case Studies (Tutorial). - Ralf Kramer (SIGMOD Conference, 1997)

The Network as a Global Database: Challenges of Interoperability, Proactivity, Interactiveness, Legacy. - Peter C. Lockemann; Ulrike Kölsch; Arne Koschel; Ralf Kramer; Ralf Nikolai; Mechtild Wallrath; Hans-Dirk Walter (VLDB, 1997)

Thesaurus Federations: Loosely Integrated Thesauri for Document Retrieval in Networks Based on Internet Technologies. - Ralf Kramer; Ralf Nikolai; Corinna Habeck (Int. J. Digit. Libr., 1997)

WWW-UDK: A Web-based Environmental Meta-Information System. - Ralf Kramer; Ralf Nikolai; Arne Koschel; Claudia Rolker; Peter C. Lockemann; Andree Keitel; Rudolf Legat; Konrad Zirm (SIGMOD Rec., 1997)

Distributed Information Systems (Extended Abstract). - Ralf Kramer; Peter C. Lockemann (ADBIS, 1998)

Thesaurus Federations: A Framework for the Flexible Integration of Heterogeneous, Autonomous Thesauri. - Ralf Nikolai; A. Traupe; Ralf Kramer (ADL, 1998)

Configurable event triggered services for CORBA-based systems. - Arne Koschel; Ralf Kramer (EDOC, 1998)

Interoperabilität Web-basierter Umweltkatalogsysteme. - Ralf Kramer; Wassili Kazakos; Arne Koschel; Ralf Nikolai; Claudia Rolker (Workshop Integration heterogener Softwaresysteme, 1998)

WebCDS - A Java-based Catalogue System for European Environment Data. - Wassili Kazakos; Ralf Kramer; Ralf Nikolai; Claudia Rolker; Sigfus Bjarnason; Stefan Jensen (IADT, 1998)

Quality of Service Transferred to Information Retrieval: The Adaptive Information Retrieval System. - Claudia Rolker; Ralf Kramer (CIKM, 1999)

Multidimensional Access to European Environmental Data. - Wassili Kazakos; Ralf Kramer; Ralf Nikolai; Dimitri Nikolaidis (DEXA Workshop, 1999)

Applying Configurable Event-triggered Services in Heterogeneous, Distributed Information Systems. - Arne Koschel; Ralf Kramer (EFIS, 1999)

GenThes: A General Thesaurus Browser for Web-based Catalogue Systems. - Ralf Nikolai; Ralf Kramer; Marc Steinhaus; Bruno Felluga; Paolo Plini (MD, 1999)

Metadata: Lessons Learned and Best Practices. - Ralf Kramer (EnviroInfo, 2008)

Konferenzsysteme - Geschäftsmodelle und Chancen für neue Marktteilnehmer. - Ralf Kramer (HMD Prax. Wirtsch., 2013)