%0 Journal Article %A A. N. Guz %T Singularity order at the crack tip in materials with initial stresses %J Doklady Akademii Nauk %D 1986 %P 310-313 %V 289 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1986_289_2_a11/ %G ru %F DAN_1986_289_2_a11