- eBookTopological Methods in the Theory of Functions of a Complex Variable. (AM-15), Volume 15Marston Morse
- eBookVariational AnalysisMarston Morse
- eBookSerien: Mathematical NotesPaula Tretkoff
- eBookSerien: Dover Books on MathematicsFrederick Mosteller
- eBookSerien: Annals of Mathematics StudiesRichard Taylor
- eBookSerien: Mathematical NotesPaula Tretkoff