Geodesic
A divisibility theorem for the Alexander polynomial of a plane algebraic curve
Zapiski Nauchnykh Seminarov POMI, Geometry and topology. Part 7, Tome 280 (2001), pp. 146-156

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An upper estimate for the Alexander polynomial of an algebraic curve is obtained, which sharpens Libgober's estimate in terms of the local polynomials at the singular points of the curve: only those singular points may contribute to the Alexander polynomial of the curve that are in the excess of the hypothesis of Nory's vanishing theorem. 
@article{ZNSL_2001_280_a7,
     author = {A. I. Degtyarev},
     title = {A divisibility theorem for the {Alexander} polynomial of a plane algebraic curve},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {146--156},
     publisher = {mathdoc},
     volume = {280},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2001_280_a7/}
}
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A. I. Degtyarev. A divisibility theorem for the Alexander polynomial of a plane algebraic curve. Zapiski Nauchnykh Seminarov POMI, Geometry and topology. Part 7, Tome 280 (2001), pp. 146-156. http://geodesic.mathdoc.fr/item/ZNSL_2001_280_a7/