@article{GDZPPN00117410X, title = {A Stable Interior Penalty Method for Convex Extremal Problems.}, journal = {Numerische Mathematik}, volume = {28}, year = {1977}, pages = {149-158}, zbl = {0368.90114}, url = {http://dml.mathdoc.fr/item/GDZPPN00117410X} }
Hartung, J. A Stable Interior Penalty Method for Convex Extremal Problems.. Numerische Mathematik, Tome 28 (1977) pp. 149-158. http://gdmltest.u-ga.fr/item/GDZPPN00117410X/