Family of periodic orbits of the precessing model with b ≠ c and GM_b = 0.1 (first row: 3D view; second, third, and fourth rows: (x,y), (x,z), and (y,z) projections, respectively) and stability indexes (bottom row) for ε = 0,0.1,0.2 (left, middle and right columns, respectively). In the first four rows, the red dashed lines outline the position of the triaxial Ferrers bar, while the blue lines are periodic orbits of the precessing model. In the bottom row: dark magenta (brown) lines indicate the b₁ (b₂) stability index.