TY  - BOOK
AU  - Heinonen, Juha ; Kilpeläinen, Tero ; Martio, O.
TI  -  Nonlinear potential theory of degenerate elliptic equations
SN  - 0486450503
U1  - 515.96 
PY  - 1993///.xi, 404p
CY  - New york
PB  - Dover publications
ER  -