@book{57255,
author = {Wolfgang Hackbusch},
title = {{Elliptic differential equations\,:\,theory and numerical treatment}},
edition = {Second printing},
pages = {XIV, 311},
publisher = {Springer},
address = {Berlin [u.a.]},
year = {2003},
series = {Springer series in computational mathematics},
volume = {18},
isbn = {3-540-54822-x},
issn = {0179-3632},
}