Historical Grammar of Old Prussian
- A complete historical phonology and morphology of Old Prussiân (or rather, what is known of it). Translation from Lithuanian of a manual by Vytautas Mažiulis.
- http://donelaitis.vdu.lt/prussian/mazgr.pdf

The Linguistic Position of the Prussian Second Catechism
- Detailed analysis by Frederik Kortlandt of the phonology and grammar of the version of the Old Prussian language found in the Second Catechism (originally published in the journal Baltistica in 2002).
- http://www.kortlandt.nl/publications/art215e.pdf

Old Prussian Texts
- Electronic versions of some of the most important sources of information on the Old Prussian language, including the Elbing Vocabulary, Simon Grunau's Vocabulary, the Prussian Catechismus I and II, and the Prussian Enchiridion. Editor: prof. Frederik Kort
- http://www.kortlandt.nl/editions/

Prussian Language Reconstructions
- General linguistic information and dictionary of an extinct language within the Baltic family.
- http://donelaitis.vdu.lt/prussian/reconstructions.htm