1 files changed, 9 insertions, 1 deletions
diff --git a/ref.bib b/ref.bib
index 7507e59..1fac4fb 100644
--- a/ref.bib
+++ b/ref.bib
@@ -150,4 +150,12 @@ MRREVIEWER = {Jean Mawhin},
   MRNUMBER = {969367},
        URL = {https://doi.org/10.1007/978-3-642-61566-5},
 }
-		
-\ No newline at end of file
+		
+@book{dobrowolski2010angewandte,
+  title={Angewandte Funktionalanalysis: Funktionalanalysis, Sobolev-R{\"a}ume und elliptische Differentialgleichungen},
+  author={Dobrowolski, M.},
+  isbn={9783642152696},
+  series={Springer-Lehrbuch Masterclass},
+  year={2010},
+  publisher={Springer Berlin Heidelberg}
+}
+\ No newline at end of file