  The Schwinger-Dyson equations for Green functions and 3-vertexes in planar
approximation used 50 years ago in the earlier theory of conformal bootstrap
are written in frames of the AdS/CFT correspondence. The technique of
"Wightman-Witten" diagrams is used in calculations of the bubble bulk diagrams
that permitted to obtain the values of conformal dimensions of primary
operators in two models of the interacting bulk scalar fields which conformal
dimensions obey "extremal" relation. Simple expressions for the four-point tree
"Wightman-Witten" correlators of these primary operators are obtained and
spectra of corresponding Bethe-Salpeter equations are calculated.
