@article{ZNSL_2004_317_a8,
     author = {K. L. Malyshev},
     title = {The condition of quasi-periodicity in imaginary time as a~constraint at the functional integration and the time-dependent {ZZ-correlator} of the {XX} {Heisenberg} magnet},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {142--173},
     publisher = {mathdoc},
     volume = {317},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2004_317_a8/}
}