1. Brieven als Buit-corpus. Leiden University. Compiled by Marijke van der Wal (Programme leader), Gijsbert Rutten, Judith Nobels and Tanja Simons, with the assistance of volunteers of the Leiden-based Wikiscripta Neerlandica transcription project, and lemmatised, tagged and provided with search facilities by the Institute for Dutch Lexicology (INL). 3rd release January 2021. http://hdl.handle.net/10032/tm-a2-s4
2. Corpus Middelnederlands (Version 1.0) (January 2021) [Online service]. Available at the Dutch Language Institute: http://hdl.handle.net/10032/tm-a2-r9
3. Delpher newspaper corpus. Available at https://www.delpher.nl
4. Nexis Uni newspaper database (for Dutch). Accessed via the Leiden University Library.
5. OpenSoNaR [Online service]. Compiled by Oostdijk, Nelleke, Martin Reynaert, Veronique Hoste & Ineke Schuurman. 2018. Available at the Dutch Language Institute: http://hdl.handle.net/10032/tm-a2-c7