%0 Journal Article %A V. A. Galaktionov %T On Nonexistence of Baras--Goldstein Type without Positivity Assumptions for Singular Linear and Nonlinear Parabolic Equations %J Informatics and Automation %D 2008 %P 130-150 %V 260 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2008_260_a8/ %G en %F TRSPY_2008_260_a8