Polynomial Operations on Rational Languages. - Mustapha Arfi (STACS, 1987)

Opérations polynomiales et hiérarchies de concaténation. - Mustapha Arfi (Theor. Comput. Sci., 1991)

Strategical languages of infinite words. - Mustapha Arfi; Bedine Ould M. Lemine; Carla Selmi (Inf. Process. Lett., 2009)