9 books • 5 series
On the Eigenfunctions of Many-Particle Systems in Quantum Mechanics (Large Text Classic Reprint)
Abstract differential equations and nonlinear mixed problems (Publications of the Scuola Normale Superiore)
Perturbation Theory for Linear Operators. (Classics in Mathematics, #132) (Grundlehren Der Mathematischen Wissenschaften (Springer Hardcover), #132) (Grundlehren der Mathematischen Wissenschaften, #132) (Encyclopedia of Plant Physiology, #132)