add missing refs

Author: knarrff

bibliography.bib

@@ -1409,6 +1409,27 @@ @Article{Detmer2009
   publisher = {Oxford University Press ({OUP})},
 }
 
+@Online{DFGCall2016NachhaltigkeitFS,
+  author  = {{German Research Foundation}},
+  title   = {Call: Nachhaltigkeit von Forschungssoftware (pdf)},
+  url     = {https://www.dfg.de/resource/blob/172674/1bcb181a6451fdac9d94421776b52798/161026-dfg-ausschreibung-forschungssoftware-de-data.pdf},
+  urldate = {2025-02-20},
+}
+
+@Online{DFGCall2019Qualitaetssicherung,
+  author  = {{German Research Foundation}},
+  title   = {Call: Qualitätssicherung von Forschungssoftware durch ihre nachhaltige Nutzbarmachung},
+  url     = {https://www.dfg.de/de/aktuelles/neuigkeiten-themen/info-wissenschaft/2019/info-wissenschaft-19-44},
+  urldate = {2025-02-20},
+}
+
+@Online{DFGCall2022ResearchSoftware,
+  author  = {{German Research Foundation}},
+  title   = {Call: Research Software – Quality Assured and Re-usable},
+  url     = {https://www.dfg.de/en/news/news-topics/announcements-proposals/2022/info-wissenschaft-22-85},
+  urldate = {2025-02-20},
+}
+
 @Misc{DFGResearchSoftwareCall2022,
   author = {{German Research Foundation}},
   title = {Research Software -- Quality Assured and Re-usable},