Geodesic
A description of normal extensions
Matematičeskie zametki, Tome 53 (1993) no. 5, pp. 21-28 
B. N. Biyarov; M. Otelbaev. A description of normal extensions. Matematičeskie zametki, Tome 53 (1993) no. 5, pp. 21-28. http://geodesic.mathdoc.fr/item/MZM_1993_53_5_a2/
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     title = {A description of normal extensions},
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Voir la notice de l'article provenant de la source Math-Net.Ru

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