upward

Fields

Jackiw R, Rebbi C, Solitons with fermion number 1/2, PRD 13, 3398 (1976)

Dashen R F, Hasslacher B, Neveu A, Semiclassical bound states in an asymptotically free theory, PRD 12, 2443 (1975)

Gross D J, Neveu A, Dynamical symmetry breaking in asymptotically free field theories, PRD 10, 3235 (1974)