@article{TMF_1971_7_1_a2,
     author = {L. G. Zastavenko},
     title = {On the ground state of the {Hamiltonian} in the simplest model of quantum-field theory},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {20--29},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1971_7_1_a2/}
}