We prove that for a germ of normal isolated singularity obtained by contracting a curve if the fundamental group of the link singularity is infinite then the universal covering of can be written as the union of Stein open subsets.
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Mihnea Colţoiu, Cezar Joiţa, Mihai Tibăr, -Convexity Properties of the Coverings of a Link Singularity. Publ. Res. Inst. Math. Sci. 48 (2012), no. 2, pp. 409–417DOI 10.2977/PRIMS/74