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@article{MS2_1984__54_166875, author = {Pekka Neittaanm\"aki and Michal Kr{\'\i}zek}, title = {On the validity of {Friedrichs'} inequalities.}, journal = {Mathematica Scandinavica}, pages = {17--26}, publisher = {mathdoc}, volume = {54}, year = {1984}, zbl = {0555.35003}, url = {http://geodesic.mathdoc.fr/item/MS2_1984__54_166875/} }
Pekka Neittaanmäki; Michal Krízek. On the validity of Friedrichs' inequalities.. Mathematica Scandinavica, Tome 54 (1984), pp. 17-26. http://geodesic.mathdoc.fr/item/MS2_1984__54_166875/