1. Agrawal, M., Vinay, V.: Arithmetic circuits: a chasm at depth four. In: 49th Annual IEEE Symposium on Foundations of Computer Science, FOCS 2008, October 25–28, 2008, Philadelphia, PA, USA, pp. 67–75 (2008)
2. Algorithms and Computation in Mathematics;P Bürgisser,2000
3. Eisenbrand, F., Pach, J., Rothvoß, T., Sopher, N.B.: Convexly independent subsets of the Minkowski sum of planar point sets. Electron. J. Combin., 15(1): Note 8, 4 (2008)
4. Cambridge Mathematical Library;GH Hardy,1988
5. Hrubes, P.: A note on the real $$\tau $$ -conjecture and the distribution of complex roots. Theo. Comput. 9(10), 403–411 (2013). http://eccc.hpi-web.de/report/2012/121/