%0 Journal Article %A Stynes, Martin %A Kellogg, R. Bruce %T $N$-widths for singularly perturbed problems %J Mathematica Bohemica %D 2002 %P 343-352 %V 127 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.2002.134155/ %R 10.21136/MB.2002.134155 %G en %F 10_21136_MB_2002_134155