. "EFFECTIVENESS OF HADAMARD PRODUCT OF BASIC SETS OF POLYNOMIALS OF SEVERAL COMPLEX VARIABLES IN HYPERELLIPTICAL REGIONS Vol. 3(1) Jan 2015, No. 5, pp. 52-65 M. A. ABUL-DAHAB, A. M. SALEEM, Z. M. KISHKA", Electronic Journal of Mathematical Analysis and Applications, 3, 1, 2015, -. doi: 10.21608/ejmaa.2015.310695