@article{TMF_1991_86_3_a4,
     author = {S. Ya. Zhitomirskaya and V. A. Mandel'shtam},
     title = {Aharonov-Bohm problem on a~square lattice},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {353--366},
     publisher = {mathdoc},
     volume = {86},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1991_86_3_a4/}
}