%0 Journal Article %A K. L. Malyshev %T Functional Integration with an ``Automorphic'' Boundary Condition and Correlators of Third Components of Spins in the $XX$ Heisenberg Model %J Teoretičeskaâ i matematičeskaâ fizika %D 2003 %P 285-298 %V 136 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2003_136_2_a7/ %G ru %F TMF_2003_136_2_a7