Enumeration of self dual 2k circulant codes. - Alain Poli; C. Rigoni (AAECC, 1984)

Self-Dual Codes 2n Circulant Over Fq (q=2r). - Alain Poli; C. Rigoni (AAECC, 1985)

Construction of n variable codes. - C. Rigoni (Discret. Math., 1985)

Self-dual doubly circulant codes. - Michel Ventou; C. Rigoni (Discret. Math., 1985)