What is mathematics? : an elementary approach to ideas and methods
by Richard Courant and Herbert Robbins.
[4th ed.?].
London : Oxford University Press, ©1969, ©1941.
xix, 521 págs. : ilustraciones ; 24 cm.
"Suggestions for further reading": p. 511-514.
Reseña: MathSciNet, 3,144b