Geodesic
On~a~conjecture of Samuel
Sbornik. Mathematics, Tome 10 (1970) no. 1, pp. 127-137

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We construct examples disproving Samuel's conjecture stating that the ring $A[[T]]$ is factorial for a complete factorial local ring $A$. We also prove a theorem asserting (under some restrictions) that the ring $A[[T]]$ is factorial for a “'geometrically” factorial ring $A$. Bibliography: 16 titles. 
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     author = {V. I. Danilov},
     title = {On~a~conjecture of {Samuel}},
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     url = {http://geodesic.mathdoc.fr/item/SM_1970_10_1_a8/}
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V. I. Danilov. On~a~conjecture of Samuel. Sbornik. Mathematics, Tome 10 (1970) no. 1, pp. 127-137. http://geodesic.mathdoc.fr/item/SM_1970_10_1_a8/