structure; ch1, ch2 beginnings

proseminar.bib

@@ -0,0 +1,20 @@
+@book{heuser,
+    title = {Gew{\"o}hnliche Differentialgleichungen},
+    subtitle = {Einf{\"u}hrung in Lehre und Gebrauch},
+    series = {Mathematische Leitfäden},
+    author = {Heuser, Harro},
+    year = {2009},
+    edition = {6},
+    publisher = {Vieweg+Teubner Verlag},
+    isbn = {978-3-8348-0705-2}
+}
+
+@book{grune,
+    title = {Gew{\"o}hnliche Differentialgleichungen},
+    subtitle = {Eine Einführung aus der Perspektive der dynamischen Systeme},
+    author = {Gr{\"u}ne, Lars and Junge, Oliver},
+    year = {2009},
+    publisher = {Vieweg+Teubner Verlag},
+    series = {Bachelorkurs Mathematik},
+    isbn = {978-3-8348-9261-4}
+}