Долбня И.П. Новое доказательство основной теоремы Алгебры // Записки Горного института. 1908. Т. № 4 1. С. 275-276.
Dolbny I.P. New proof of the fundamental theorem of Algebra // Journal of Mining Institute. 1908. Vol. № 4 1. p. 275-276.
We will change x along a closed curve in the positive direction. A full description of the proof is in the article.