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We present a calculation of the strong decays of the exotic states$Z_b(10610)$ and $Z_b'(10650)$ using a covariant quark model. We use amolecular-type four-quark current for the coupling of the $Z_b(10610)$ and$Z_b'(10650)$ to the constituent heavy and light quarks.

$Z_b(10610)$ and $Z_b'(10650)$ decays in a covariant quark model