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References
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J. E. Littlewood, Some Problems in Real and Complex Analysis, D. C. Heath and Co., Lexington, MA, 1968   |
| 2. |
P. Borwein, T. Erdélyi, R. Ferguson, R. Lockhart, “On the zeros of cosine polynomials: solution to a problem of Littlewood”, Ann. of Math. (2), 167:3 (2008), 1109–1117  |
| 3. |
T. Erdélyi, “The number of unimodular zeros of self-reciprocal polynomials with coefficients in a finite set”, Acta Arith., 176:2 (2016), 177–200 |
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T. Erdélyi, “Improved lower bound for the number of unimodular zeros of self-reciprocal polynomials with coefficients in a finite set”, Acta Arith., 192:2 (2020), 189–210 |
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J. Sahasrabudhe, “Counting zeros of cosine polynomials: on a problem of Littlewood”, Adv. Math., 343:5 (2019), 495–521 |
| 6. |
T. Juŝkeviĉius, J. Sahasrabudhe, Cosine Polynomials with Few Zeros, 2020, arXiv: 2005.01695v1 |
