TY  - BOOK
AU  - Hoffmann, Karl-Heinz,
AU  - Sprekels, J.
ED  - Longman Scientific Technical
TI  - Free boundary problems: Theory and applications 
SN  - 047021997
AV  - TA347.V3 F73 1990
PY  - 1990///
CY  - London
PB  - Longman scientific technical ; new york, J. Wiley
KW  - Problemas de valores de frontera
KW  - Congresos
ER  -