I review the possible measurements that can be used to better constrain the CKM unitarity triangle parameter 𝛾 (also known as 𝜙 3 ). These include: the approach to perform unbinned modelindependent Dalitz plot analysis of the 𝐵 → 𝐷𝐾 transitions followed by 𝐷 → 𝐾 0 𝑆 𝜋 + 𝜋 − decay; double Dalitz plot analysis of 𝐵 → 𝐷𝐾𝜋, 𝐷 → 𝐾 0 𝑆 𝜋 + 𝜋 − decays; measurements with four-body 𝐷 meson decays, and quantum-correlated analysis of 𝜒 𝑐1 (3872) → 𝐷𝐷 decays.