TY  - BOOK
AU  - Janusz Brzd?k, Dorian Popa, Themistocles M. Rassias
TI  - Ulam Type Stability 
SN  - 9783030289720
PB  - Springer
UR  - https://link.springer.com/openurl?genre=book&isbn=978-3-030-28972-0
ER  -