%0 Journal Article %A V. V. Borzov %T Upper bound for the partition function of~$P(\varphi)_2$ Euclidean field theory with Dirichlet boundary conditions %J Teoretičeskaâ i matematičeskaâ fizika %D 1983 %P 373-381 %V 57 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1983_57_3_a4/ %G ru %F TMF_1983_57_3_a4