1. Arnold, V.I.: Normal forms of functions near degenerate critical points. Weyl groupsA k ,D k ,E k and Lagrange singularities. Functional Anal. and its Appl. Vol.6, Noo 4, 3?25 (1972)
2. Arnold, V.I.: A Letter to International Conference on Manifolds and related Topics, Tokyo (1973)
3. Artin, M.: On isolated rational singularities of surfaces. Am. J. Math.88, 129?136 (1966)
4. Atiyah, M.F.: Resolution of singularities and division of distributions. Comm. Pure Appl. Math.23, No 2, 145?150 (1970)
5. Bernstein, I. N.: Analytic extension of generalized functions by one parameter. Functional Anal. and its Appl. Vol.6, No 4, 26?40 (1972)