%0 Journal Article %A P. Rajkovic %A M. Ivkovic %A M. Petkovic %T A Conjecture about Positivity of the Polynomials Obtained by the Expanding of a Product %J Mathematica balkanica %D 2004 %P 419 %V 18 %N 3-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MABA_2004_18_3-4_a21/ %F MABA_2004_18_3-4_a21