@article{AA_1994_6_2_a4,
     author = {A. G. Izergin and A. R. Its and V. E. Korepin and N. A. Slavnov},
     title = {The matrix {Riemann--Hilbert} problem and differential equations for correlation functions of the $XXO$ {Heisenberg} chain},
     journal = {Algebra i analiz},
     pages = {138--151},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1994_6_2_a4/}
}