Andmebaaside projekteerimineEessaar, Erki2008 http://www.ester.ee/record=b2431333*est

Binaarsed relatsioonidTombak, MatiA & A2009 / 5, lk. 5-11 https://artiklid.elnet.ee/record=b1507126*est

Mapping of SQL relational schemata to OWL ontologiesAstrova, Irina; Kalja, AhtoProceedings of the 6th WSEAS International Conference on Applied Informatics and Communications : Crete Island, Greece, August 18-20, 20062006 / p. 375-380 https://dl.acm.org/doi/abs/10.5555/1366421.1366487

On integration of object-oriented applications with relational databasesAstrova, Irina2003 http://www.ester.ee/record=b1833107*est

On schema transformation of relational database into object-oriented databaseAstrova, IrinaProceedings of the 4th International Workshop on Computer Science and Information Technologies, Patras, Greece2002 / [4] p

Relational and object-relational database management systems as platforms for managing software engineering artifactsEessaar, Erki2006 https://digi.lib.ttu.ee/i/?85 https://www.ester.ee/record=b2209676*est

SQL or third manifesto compliant object-relational database management systems as the platforms for maintainaning the whole-part relationships in a databaseEessaar, ErkiWSEAS transactions on computers2006 / 10, p. 2440-2447

Storing OWL ontologies in SQL relational databasesAstrova, Irina; Korda, Nahum; Kalja, AhtoInternational journal of electrical, computer, and systems engineering2007 / 4, p. 242-247 https://zenodo.org/records/1071690

Storing OWL ontologies in SQL relational databasesAstrova, Irina; Korda, Nahum; Kalja, AhtoProceedings of World Academy of Science, Engineering and Technology (WASET) : International Conference on Computer, Electrical, and Systems Science, and Engineering (CESSE) : Berlin, Germany, 20072007 / p. 169-172 https://www.researchgate.net/publication/242756222_Storing_OWL_ontologies_in_SQL_relational_databases

Об одном подходе к построению реляционной базы данныхMaran, MihkelАнализ и моделирование технических устройств и систем АСУТП1977 / с. 69-75 https://www.ester.ee/record=b2190987*est