no. 4
Smoothing and interpolation in a convex subset of a Hilbert space : II. The semi-norm case
ESAIM: Modélisation mathématique et analyse numérique, Tome 25 (1991) no. 4, pp. 425-440. 
@article{M2AN_1991__25_4_425_0,
     author = {Micchelli, Charles A. and Utreras, Florencio I.},
     title = {Smoothing and interpolation in a convex subset of a {Hilbert} space : {II.} {The} semi-norm case},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {425--440},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {25},
     number = {4},
     year = {1991},
     mrnumber = {1108584},
     zbl = {0741.65045},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1991__25_4_425_0/}
}
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Micchelli, Charles A.; Utreras, Florencio I. Smoothing and interpolation in a convex subset of a Hilbert space : II. The semi-norm case. ESAIM: Modélisation mathématique et analyse numérique, Tome 25 (1991) no. 4, pp. 425-440. http://www.numdam.org/item/M2AN_1991__25_4_425_0/

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