John, Fritz.
Partial Differential Equations / - Third Ed. / - New Delhi-2 : Narosa Publishing House , 1981 - p.194 :
3-540-78022-X
Mathematics
B334 / L1,L8;3
Partial Differential Equations / - Third Ed. / - New Delhi-2 : Narosa Publishing House , 1981 - p.194 :
3-540-78022-X
Mathematics
B334 / L1,L8;3