1
Space-filling curves /
Book
Other Personal Name(s): ...Sagan, Hans...
Table of Contents 
2
Space-filling curves [E-Book] /
Other Personal Name(s): ...Sagan, Hans...

Full text 
3
Introduction to the calculus of variations.
Book
Other Personal Name(s): ...Sagan, Hans....
4
Boundary and eigenvalue problems in mathematical physics /
Book
Other Personal Name(s): ...Sagan, Hans....