00885nam0-22003131i-450-9900013250304033213-540-56877-8000132503FED01000132503(Aleph)000132503FED0100013250320000920d1993----km-y0itay50------baengDynkin graphs and quadrilateral singularitiesTohsuke Urabe.BerlinSpringer-Verlagc1993.VI, 233 p.24 cmLecture Notes in Mathematics1548 .Geometria algebricaSuperfici516.35Urabe,Tohsuke60105ITUNINARICAUNIMARCBK990001325030403321C-20-(154810965MA1MA1Dynkin graphs and quadrilateral singularities78691UNINAING01