A combinatorial lemma for complex numbers. Baxter, G. Ann. Math. Statist., 32:901–904, 1961.
bibtex   
@article{MR0126290,
	Author = {Baxter, Glen},
	Date-Added = {2012-11-13 15:38:53 -0600},
	Date-Modified = {2012-11-13 15:38:53 -0600},
	Fjournal = {Annals of Mathematical Statistics},
	Issn = {0003-4851},
	Journal = {Ann. Math. Statist.},
	Mrclass = {60.66},
	Mrnumber = {0126290 (23 \#A3586)},
	Mrreviewer = {F. L. Spitzer},
	Pages = {901--904},
	Title = {A combinatorial lemma for complex numbers},
	Volume = {32},
	Year = {1961},
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