- Libro electrónicoIntroduction to Calculus and Analysis II/1Richard Courant
- Libro electrónicoContributions to the Theory of Partial Differential Equations. (AM-33), Volume 33Lipman Bers
- Libro electrónicoSeries: Dover Books on MathematicsRobert Gilmore
- Libro electrónicoSeries: Annals of Mathematics StudiesRichard Taylor