TY  - BOOK
AU  - Seiro Omata, Karel Svadlenka, Elliott Ginder
TI  - Variational Approach to Hyperbolic Free Boundary Problems 
SN  - 9789811967313
PB  - Springer
UR  - https://link.springer.com/openurl?genre=book&isbn=978-981-19-6731-3
ER  -