Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_1990_4_3-4_a2, author = {V. H. Hristov and K. G. Ivanov}, title = {Realization of {K-Functionals} on {Subsets} and {Constrained} {Approximation}}, journal = {Mathematica balkanica}, pages = {236}, publisher = {mathdoc}, volume = {4}, number = {3-4}, year = {1990}, url = {http://geodesic.mathdoc.fr/item/MABA_1990_4_3-4_a2/} }
V. H. Hristov; K. G. Ivanov. Realization of K-Functionals on Subsets and Constrained Approximation. Mathematica balkanica, Tome 4 (1990) no. 3-4, p. 236. http://geodesic.mathdoc.fr/item/MABA_1990_4_3-4_a2/