Arnold, V. I. . Dynamica Systems VI (Singularity Theory I) / Textual Documents V. I. Arnold. - 1st ed. / - New York : Springer-Verlag , 1991. - 245p. ; 23 cm.. ISBN: 3-540-50583-0 Subjects--Index Terms: G-Encyclopaedia Dewey Class. No.: 030.51 / Ar 61 Dy