%0 Journal Article %A Ya. Sh. Il'yasov %T On Global Positive Solutions of Parabolic Equations with a Sign-Indefinite Nonlinearity %J Differencialʹnye uravneniâ %D 2005 %P 518-526 %V 41 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2005_41_4_a8/ %G ru %F DE_2005_41_4_a8