Zhang Jianhua. PROBLEMS OF THE BEST APPROXIMATION IN WIENER-SOBOLEV SPACE[J]. Journal of Civil and Environmental Engineering, 1992, 14(4).

DOI：

Zhang Jianhua. PROBLEMS OF THE BEST APPROXIMATION IN WIENER-SOBOLEV SPACE[J]. Journal of Civil and Environmental Engineering, 1992, 14(4). DOI： 10.11835/j.issn.1674-4764.1992.04.016.