Object Query Optimization in the Stack-Based Approach. - Jacek Plodzien; Anna Kraken (ADBIS, 1999)

Object Query Optimization through Detecting Independent Subqueries. - Jacek Plodzien; Anna Kraken (Inf. Syst., 2000)

Query Optimization through Removing Dead Subqueries. - Jacek Plodzien; Kazimierz Subieta (ADBIS, 2001)

Applying Low-Level Query Optimization Techniques by Rewriting. - Jacek Plodzien; Kazimierz Subieta (DEXA, 2001)

Static Analysis of Queries as a Tool for Static Optimization. - Jacek Plodzien; Kazimierz Subieta (IDEAS, 2001)

Objects and Roles in the Stack-Based Approach. - Andrzej Jodlowski; Piotr Habela; Jacek Plodzien; Kazimierz Subieta (DEXA, 2002)

Extending OO Metamodels towards Dynamic Object Roles. - Andrzej Jodlowski; Piotr Habela; Jacek Plodzien; Kazimierz Subieta (OTM, 2003)

Dynamic Object Roles – Adjusting the Notion for Flexible Modeling. - Andrzej Jodlowski; Piotr Habela; Jacek Plodzien; Kazimierz Subieta (IDEAS, 2004)

Towards improving the quality of e-Learning resources. - Alina Stasiecka; Jacek Plodzien; Ewa Stemposz (MTSR, 2005)

New categories for learning objects metadata. - Alina Stasiecka; Jacek Plodzien; Ewa Stemposz (MTSR, 2005)

Measures for Estimating the Quality of E-Learning Materials in the Didactic Aspect. - Alina Stasiecka; Jacek Plodzien; Ewa Stemposz (WEBIST (2), 2006)

The Classification of E-Learning Resources Metadata: A Proposal. - Alina Stasiecka; Jacek Plodzien; Ewa Stemposz (WEBIST (2), 2006)

Introducing New Elements into the Scorm Standard Metadata. - Alina Stasiecka; Jacek Plodzien; Ewa Stemposz (WEBIST (2), 2006)

An approach to the quality and reusability of metadata specifications for e-learning objects. - Jacek Plodzien; Ewa Stemposz; Alina Stasiecka (Online Inf. Rev., 2006)