%0 Journal Article %A Kh. K. Ishkin %A Kh. Kh. Murtazin %T Quantum defect for the Dirac operator with a nonanalytic potential %J Teoretičeskaâ i matematičeskaâ fizika %D 2000 %P 444-452 %V 125 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2000_125_3_a3/ %G ru %F TMF_2000_125_3_a3