Jirka Hana, Jan Štěpánek: Prague Markup Language Framework. In: Proceedings of the Sixth Linguistic Annotation Workshop, Association for Computational Linguistics, Stroudsburg, PA, USA, ISBN 978-1-937284-32-9, pp. 12-21, 2012

Petr Pajas, Jan Štěpánek: System for Querying Syntactically Annotated Corpora, in Proceedings of the ACL-IJCNLP 2009 Software Demonstrations, Suntec, Singapore, pp. 33-36, 2009

Petr Pajas, Jan Štěpánek: Recent Advances in a Feature-Rich Framework for Treebank Annotation, in The 22nd International Conference on Computational Linguistics - Proceedings of the Conference, Manchester, pp. 673-680, 2008

Petr Pajas, Jan Štěpánek: XML-Based Representation of Multi-Layered Annotation in the PDT 2.0. In: Proceedings of LREC 2006 Workshop on Merging and Layering Linguistic Information. ELRA, Genoa, Italy, 2006.