1. P. A. Mozolyako, "On the definition of Bourgain points of a Borel charge on the real line," Zap. Nauchn. Semin. POMI, 389, 191-205 (2011)
2. English transl., J. Math. Sci., 182, No. 5, 690-698 (2012).
3. J. Bourgain, “On the radial variation of bounded analytic functions on the disc,” Duke Math. J., 3, Vol. 69, 671–682 (1993).
4. J. Bourgain, "Boundedness of variation of convolution of measures," Mat. Zametki, 54, No. 4, 24-33 (1993)
5. English transl., Math. Notes, 54, Nos. 3-4, 995-1001 (1993).