Geodesic
On correlation functions of the $XY$ model
Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 13, Tome 224 (1995), pp. 178-191 
A. G. Izergin; N. A. Kitanin; N. A. Slavnov. On correlation functions of the $XY$ model. Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 13, Tome 224 (1995), pp. 178-191. http://geodesic.mathdoc.fr/item/ZNSL_1995_224_a13/
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     title = {On correlation functions of the $XY$ model},
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     pages = {178--191},
     year = {1995},
     volume = {224},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1995_224_a13/}
}
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

New determinant representations are obtained for the simplest correlation functions of the Heisenberg $XY$ spin chain. Bibliography: 8 titles.