Updated content.

refs.bib

@@ -0,0 +1,56 @@
+@book{Taylor,
+  title={Partial Differential Equations: Basic Theory},
+  author={Taylor, M.E.},
+  isbn={9780387946542},
+  lccn={lc95054104},
+  series={Applied mathematical sciences},
+  url={https://books.google.ca/books?id=vISPd8QJfHoC},
+  year={1996},
+  publisher={Springer}
+}
+@book{Evans,
+  title={Partial Differential Equations},
+  author={Evans, L.C.},
+  isbn={9780821807729},
+  lccn={97041033},
+  series={Graduate studies in mathematics},
+  url={https://books.google.ca/books?id=5Pv4LVB_m8AC},
+  year={1998},
+  publisher={American Mathematical Society}
+}
+@book{Chavel,
+  title={Eigenvalues in Riemannian Geometry},
+  author={Chavel, I. and Randol, B. and Dodziuk, J.},
+  isbn={9780080874340},
+  series={Pure and Applied Mathematics},
+  url={https://books.google.ca/books?id=0v1VfTWuKGgC},
+  year={1984},
+  publisher={Academic Press}
+}
+@book{Bourbaki,
+  title={General topology: chapters 1--4},
+  author={Bourbaki, Nicolas},
+  volume={18},
+  year={2013},
+  publisher={Springer Science \& Business Media}
+}
+@book{SchaeferWolff,
+  title={Topological Vector Spaces},
+  author={Schaefer, H.H. and Wolff, M.P.H.},
+  isbn={9780387987262},
+  lccn={98053842},
+  series={Graduate Texts in Mathematics},
+  url={https://books.google.ca/books?id=9kXY742pABoC},
+  year={1999},
+  publisher={Springer New York}
+}
+@book{Lang,
+  title={Real and Functional Analysis},
+  author={Lang, S.},
+  isbn={9780387940014},
+  lccn={92021208},
+  series={Graduate Texts in Mathematics},
+  url={https://books.google.ca/books?id=_3F4opD1X84C},
+  year={1993},
+  publisher={Springer New York}
+}