_:nc8054212cd4b4c4ca6f1d7cbf7e06f64xb3
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://link.springer.com/chapter/10.1007/978-3-540-25974-9_13?error=cookies_not_supported&code=a368dbfa-6127-468c-93fd-7b187090e634>