TY  - BOOK
AU  - Helmut Hofer, Krzysztof Wysocki, Eduard Zehnder
TI  - Polyfold and Fredholm Theory
SN  - 9783030780074
PB  - Springer
UR  - https://link.springer.com/openurl?genre=book&isbn=978-3-030-78007-4
ER  -