no. 2
On searching for roots of a polynomial in a circular annulus
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 27 (1993) no. 2, pp. 163-172. 
@article{ITA_1993__27_2_163_0,
     author = {Saux Picart, Ph.},
     title = {On searching for roots of a polynomial in a circular annulus},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {163--172},
     publisher = {EDP-Sciences},
     volume = {27},
     number = {2},
     year = {1993},
     mrnumber = {1217684},
     zbl = {0774.30011},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1993__27_2_163_0/}
}
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Saux Picart, Ph. On searching for roots of a polynomial in a circular annulus. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 27 (1993) no. 2, pp. 163-172. http://www.numdam.org/item/ITA_1993__27_2_163_0/

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