[1] Adams, R. A.:
Sobolev Spaces. Pure and Applied Mathematics 65, Academic Press, New York (1975).
MR 0450957 |
Zbl 0314.46030
[2] Bramble, J. H.:
Multigrid Methods. Pitman Research Notes in Mathematics Series 294, John Wiley & Sons, New York (1993).
MR 1247694 |
Zbl 0786.65094