@article{TMF_1998_116_2_a1,
     author = {S. Yu. Vernov and O. A. Khrustalev},
     title = {Approximate double-periodic solutions in $(1+1)$-dimensional $\varphi ^4$-theory},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {182--192},
     publisher = {mathdoc},
     volume = {116},
     number = {2},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1998_116_2_a1/}
}