Hajela D., “on Polynomials With Low Peak Signal to Power (l-Infinity-Norm to l2-Norm) Ratios and Theorems of Kashin and Spencer”, Stud. Appl. Math., 87:1 (1992), 81–94
Е. Д. Глускин, “Экстремальные свойства ортогональных параллелепипедов и их приложения к геометрии банаховых пространств”, Матем. сб., 136(178):1(5) (1988), 85–96 ; E. D. Gluskin, “Extremal properties of orthogonal parallelepipeds and their applications to the geometry of Banach spaces”, Math. USSR-Sb., 64:1 (1989), 85–96