1. Bernstein, I.N.: The analytic continuation of generalized functions with respect to a parameter. Functional Anal. Appl.6, 26?40 (1972)
2. Grothendieck, A.: Cohomologie Locale des Faisceaux Cohérents et Théorèmes de Lefschetz Locaux et Globeaux (SGA 2). Amsterdam: North-Holland Publ. Co. 1968
3. Lecture Notes in Math.;R. Hartshorne,1967
4. Kashiwara, M.: An algebraic study of systems of partial differential equations, local theory of differential operators (Master's thesis). Sugakushinkokai (in Japanese), 1970
5. Kashiwara, M.: On the maximally overdetermined system of linear differential equations, I. Publ. R.I.M.S., Kyoto Univ.10, 563?579 (1975)