@article{TMF_1992_90_1_a3,
     author = {L. D. Korsun and A. N. Sisakyan and I. L. Solovtsov},
     title = {Variational perturbation theory. $\varphi^{2k}$ oscillator},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {37--54},
     publisher = {mathdoc},
     volume = {90},
     number = {1},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1992_90_1_a3/}
}