  The angle $\gamma$ of the Cabibbo--Kobayashi--Maskawa unitarity triangle is a
benchmark parameter of the Standard Model of particle physics. A method to
determine $\gamma$ from $B^{\pm} \to D K^{\pm}$ with subsequent $D \to K_{\rm
S}^0\pi^+\pi^-$ or similar multibody decays has been proven to provide good
sensitivity. We review the first discussions on the use of this technique, and
its impact subsequently. We propose that this approach should be referred to as
the BPGGSZ method.
