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-rw-r--r--buch/papers/punktgruppen/references.bib9
1 files changed, 9 insertions, 0 deletions
diff --git a/buch/papers/punktgruppen/references.bib b/buch/papers/punktgruppen/references.bib
index a29640c..b669036 100644
--- a/buch/papers/punktgruppen/references.bib
+++ b/buch/papers/punktgruppen/references.bib
@@ -42,3 +42,12 @@
url = {http://archive.today/2021.07.22-083802/http://xrayweb.chem.ou.edu/notes/symmetry.html},
urldate = {2021-07-22},
}
+
+@online{punktgruppen:restriction,
+ title = {Structure of Materials},
+ author = {Silvija Gradecak-Garaj},
+ year = {2020},
+ month = {4},
+ day = {9},
+ url = {https://www.youtube.com/watch?v=Ia2eHF1ZKoI},
+ urldate = {2021-07-30}, \ No newline at end of file