@Article{484696, author = "Wiesław Dębski, Ewa Feder-Sempach, Bartosz Świderski", title = "Intervalling effect on estimating the beta parameter for the largest companies on the WSE", year = 2014, volume = 14(22), number = 2, journal = Folia Oeconomica Stetinensia, pages = s. 270-286, }