@article{TMF_1990_85_3_a8,
     author = {A. V. Zabrodin and A. A. Ovchinnikov},
     title = {Single-particle density matrix of a~one-dimensional system of spin~1/2 {Fermi} particles},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {443--449},
     publisher = {mathdoc},
     volume = {85},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_85_3_a8/}
}