TY  - BOOK
AU  - Borodzik Maciej
AU  -  Goldstein Pawel
AU  -  Rybka Piotr
AU  -  Zatorska-Goldstein Anna
TI  - Problems on partial differential equations
T2  - Problem Books in Mathematics
U1  - B33, Q9 
PY  - 2019///
KW  - Mathematics
ER  -