Merge pull request #160 from Ka-Markus/patch-6

added two references, changed on reference type from misc to article (from my @Ka-Markus last pull request)

docs/_bibliography/references.bib

@@ -394,7 +394,7 @@ @article{Cousijn2021
   pages = {100180}
 }
 
-@misc{lindlar_2020_3672773,
+@article{lindlar_2020_3672773,
   author       = {Lindlar, Michelle and
                   Rudnik, Pia and
                   Horton, Laurence and
@@ -411,3 +411,23 @@ @misc{lindlar_2020_3672773
   doi          = {10.2218/ijdc.v15i1.728},
   url          = {https://doi.org/10.2218/ijdc.v15i1.728}
 }
+
+@misc{coretrustseal_standards_and_certificatio_2022_7051012,
+  author       = {CoreTrustSeal Standards and Certification Board},
+  title        = {CoreTrustSeal Requirements 2023-2025},
+  month        = sep,
+  year         = 2022,
+  publisher    = {Zenodo},
+  version      = {V01.00},
+  doi          = {10.5281/zenodo.7051012},
+  url          = {https://doi.org/10.5281/zenodo.7051012}
+}
+
+@book{harmsen_henk_explanatory_2013,
+	series = {nestor-materials},
+	title = {Explanatory notes on the nestor {Seal} for {Trusworthy} {Digital} {Archives}. nestor {Certification} {Working} {Group}},
+	volume = {17},
+	url = {https://nbn-resolving.de/urn:nbn:de:0008-2013100901},
+	author = {Harmsen, Henk and Keitel, Christian and Schmidt, Christoph and Schoger, Astrid and Schrimpf, Sabine and Stürzlinger, Martin and Wolf, Stefan},
+	year = {2013},
+}