Quark-biquark structure of baryons: magnetic moments in QCD and in unitary symmetry

Estimates of magnetic moments of baryons of $1/2^+$ octet are analyzed in the framework of Borel rules of sums of QCD combined with а hypothesis of quark-biquark structure of baryons. For the contribution of а biquark an expression is derived: $-4e_q(1+δ_qq^8)eћ/(2cM_8),eh/(2cM8), where $δ_qq^8$ is а small correction calculated from QCD.