Author(s): M.N.Chernodub (ITEP, Moscow)
-- hep-th/0006097 was replaced with a revised version
on Sat, 21 Oct 2000 14:24:46 GMT (202kb) --
Paper: hep-th/0006097
Comments: 23 pages, 12 EPS figures, RevTeX, uses epsfig.sty; misprints
corrected (to appear in Phys.Rev.D)
Report-no: ITEP-TH-29/00
URL: http://arXiv.org/abs/hep-th/0006097