@article{ZNSL_2000_269_a18,
     author = {K. L. Malyshev},
     title = {Functional integration, zeta regularization and correlators of third components of spins in the $XXO${-Heisenberg
}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {269--291},
     publisher = {mathdoc},
     volume = {269},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_269_a18/}
}