Estimation of the sixth coefficient in the class of bounded univalent functions with real coefficients A. Zielińska; K. Zyskowska — 1983 Annales Polonici Mathematici
Sharp estimation of even coefficients of bounded symmetric univalent functions Z. J. Jakubowski; A. Zielińska; K. Zyskowska — 1983 Annales Polonici Mathematici