Metadata Repositories in Governmental Information Systems for Coastal Regions in Germany. - Wassilios Kazakos; Rainer Lehfeldt; Christian Michl; Carsten Heidmann; Aleksei Valikov (EnviroInfo, 2003)

Sharing ISO 19115 Metadata in NOKIS - Experiences, Features, Perspectives. - Wassilios Kazakos; Aleksei Valikov; Rainer Lehfeldt; Carsten Heidmann (EnviroInfo (1), 2004)

Providing Access to Environmental Data in a SOA in NOKIS. - Carsten Heidmann; Frank Sellerhoff; Rainer Lehfeldt; Aleksei Valikov; Wassilios Kazakos (EnviroInfo, 2008)

Enabling User-friendly Query Interfaces for Environmental Geodata through Semantic Technologies. - Andreas Abecker; Wassilios Kazakos; Gábor Nagypál; Aleksei Valikov (Geoinformatik, 2011)

User-Friendly Access to Structured Environmental Data. - Andreas Abecker; Veli Bicer; Wassilios Kazakos; Gábor Nagypál; Radoslav Nedkov; Aleksei Valikov (ISESS, 2011)