Geodesic
Representation of monomials as a sum of powers of linear forms
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 2 (2014), pp. 9-14 Cet article a éte moissonné depuis la source Math-Net.Ru

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We prove that the product of $n$ complex variables can be represented as a sum of $m=2^{n-1}$ $n$-powers of linear forms of $n$ variables and for any $m< 2^{n-1}$ there is no such identity with $m$ summands being $n$th powers of linear forms. 
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S. B. Gashkov; E. T. Shavgulidze. Representation of monomials as a sum of powers of linear forms. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 2 (2014), pp. 9-14. http://geodesic.mathdoc.fr/item/VMUMM_2014_2_a1/

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