@article{GDZPPN001168185, title = {Interpolation in Sobolevschen Funktionenr\"aumen.}, journal = {Numerische Mathematik}, volume = {13}, year = {1969}, pages = {334-343}, zbl = {0221.65012}, url = {http://dml.mathdoc.fr/item/GDZPPN001168185} }
NITSCHE, J. Interpolation in Sobolevschen Funktionenräumen.. Numerische Mathematik, Tome 13 (1969) pp. 334-343. http://gdmltest.u-ga.fr/item/GDZPPN001168185/