Gratis of niet gratis?
Crossref DOI link: https://doi.org/10.1007/s41190-021-0913-9
Published Online: 2021-04-02
Published Print: 2021-04
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Vroom, Marike
Bukman, Bert
Text and Data Mining valid from 2021-04-01
Version of Record valid from 2021-04-01
Article History
First Online: 2 April 2021