A semiotic approach to quality in specifications of software measuresEessaar, ErkiEnterprise information systems : 10th International Conference, ICEIS 2008 : Barcelona, Spain, June 12-16, 2008 : revised selected papers2009 / p. 73-86 : ill https://link.springer.com/chapter/10.1007/978-3-642-00670-8_6

A SQL database based meta-CASE system and its query subsystemEessaar, Erki; Sgirka, RünnoInnovations in computing sciences and software engineering2010 / p. 57-62 https://link.springer.com/chapter/10.1007/978-90-481-9112-3_10

A UML profile for developing databases that conform to the third ManifestoEessaar, ErkiInnovations in computing sciences and software engineering2010 / p. 69-74 https://ui.adsabs.harvard.edu/abs/2010iics.book...69E/abstract

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

A collaborative web-based and database-based meta-CASE environmentSgirka, RünnoDatabases and Information Systems : Doctoral Consortium : Riga, July 4, 20102010 / p. 31-42 : ill https://www.bjmc.lu.lv/fileadmin/user_upload/lu_portal/projekti/bjmc/Contents/757_3.pdf

Evaluation of different designs to represent missing information in SQL databasesEessaar, Erki; Saal, ElariInnovations and advances in computer, information, systems sciences, and engineering2013 / p. 173-187

Evaluation of Different Designs to Represent Missing Information in SQL Databases [Electronic resource]Eessaar, Erki; Saal, ElariCISSE 2011 International joint conferences2011 / [6 p. : ill] [CD-ROM] https://link.springer.com/chapter/10.1007/978-1-4614-3535-8_14

Extending UML profiles to model integrity constraints in SQL databasesEessaar, Erki; Aaberg, ErkoProceedings of the 21th [i. e. 21st] European-Japanese Conference on Information Modelling and Knowledge Bases : EJC2011 : Tallinn, Estonia, June 06-10, 2011. Vol. 12011 / p. 47-65 : ill https://www.researchgate.net/publication/260291830_Extending_UML_Profiles_to_Model_Integrity_Constraints_in_SQL_Databases

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

A novel approach to mapping SQL relational schemata to OWL ontologiesAstrova, Irina; Kalja, AhtoWSEAS transactions on information science and applications2006 / 3, p. 2215-2222

On query-based search of possible design flaws of SQL databasesEessaar, ErkiInnovations and advances in computing, informatics, systems sciences, networking and engineering2015 / p. 53-60 http://dx.doi.org/10.1007/978-3-319-06773-5_8

On the design of base tables in the SQL databases of some existing softwareEessaar, ErkiSoftware engineering perspectives in systems : proceedings of 11th Computer Science On-line Conference 2022, Vol. 12022 / p. 309-324 https://doi.org/10.1007/978-3-031-09070-7_26 Conference proceedings at Scopus Article at Scopus Article at WOS

Performance benchmarking of NewSQL databases with Yahoo cloud serving benchmarkAstrova, Irina; Koschel, Arne; Wellermann, Nils; Klostermeyer, PhilipProceedings of the Future Technologies Conference (FTC) 2020 ; vol. 22021 / p. 271-281 https://doi.org/10.1007/978-3-030-63089-8_17 Conference proceedings at Scopus Article at Scopus

Päringukeel SQL : ülevaadeLaiatarbe tarkvarapaketid personaalarvutitele. Andmebaasisüsteemid1989 / lk. 186-195 : ill https://www.ester.ee/record=b1507395*est

SQLLeis, PaulArvutustehnika ja Andmetöötlus1990 / 6, lk. 20-28

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

The usage of declarative integrity constraints in the SQL databases of some existing softwareEessaar, ErkiSoftware Engineering and Algorithms : Proceedings of 10th Computer Science On-line Conference 2021, Vol. 12021 / p. 375–390 https://doi.org/10.1007/978-3-030-77442-4_33 Conference proceedings at Scopus Article at Scopus

Using metamodeling in order to evaluate datamodelsEessaar, ErkiProceedings of the 6th WSEAS International conference on artificial Intelligence, Knowledge Engineering and Data Bases : Corfu Island, Greece, February 16-19, 20072007 / p. 181-186 https://www.researchgate.net/publication/254470284_Using_Metamodeling_in_order_to_Evaluate_Data_Models

Using SQL queries to evaluate the design of SQL databasesEessaar, Erki; Voronova, JaninaNew trends in networking, computing, e-learning, systems sciences, and engineering2015 / p. 179-186 http://dx.doi.org/10.1007/978-3-319-06764-3_23