@article{TMF_2006_147_3_a7,
     author = {Yu. A. Tserkovnikov},
     title = {Optimal method for truncating a chain of equations for two-time
},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {503--510},
     publisher = {mathdoc},
     volume = {147},
     number = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2006_147_3_a7/}
}