%0 Journal Article %A K. L. Malyshev %T Functional integration, zeta regularization and correlators of third components of spins in the $XXO$-Heisenberg %J Zapiski Nauchnykh Seminarov POMI %D 2000 %P 269-291 %V 269 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2000_269_a18/ %G ru %F ZNSL_2000_269_a18