John, Fritz.
Partial Differential Equations / - Third Ed. / - New Delhi-2 : Narosa Publishing House. - p.194 :
3-540-78022-X
Mathematics
B334 / L1,L8;1
Partial Differential Equations / - Third Ed. / - New Delhi-2 : Narosa Publishing House. - p.194 :
3-540-78022-X
Mathematics
B334 / L1,L8;1