1. Brou, P.K., Diagana, Y.M.: Indépendances affaiblies et Extensions de la Largeur analytique d’une quasi-graduation. Annales Mathématiques Africaines 4, 139–150 (2013)
2. Diagana, Y., Dichi, H., Sangaré, D.: Filtrations, Generalized analytic independence, Analytic spread. Afrika Matematika, Série 3 4, 101–114 (1994)
3. Diagana, Y.: Analytic spread of a pregraduation. In: Lecture Notes in Pure and Applied Mathematics, Commutative Ring Theory and Applications, vol. 231, pp. 107–116 (2002)
4. Diagana, Y.: Regular analytic independence and extensions of analytic spread. Commun. Algebra 30(6), 2745–2761 (2002)
5. Diagana, Y.: Quasi-graduations of rings, generalized analytic independence, extensions of the analytic spread. Afrika Matematika, Série 3 15, 93–108 (2003)