Podhorecka, Marta; Cytarska, Magdalena; Gębka, Dominika; Perkowski, Radosław; Androsiuk-Perkowska, Joanna; Jaroch, Alina; Siedlecka-Główczewska, Emilia; Sokołowski, Remigiusz; Żukow, Walery; Kędziora-Kornatowska, Kornelia
(2017)
Introduction: Research shows that over the half of people in the age of more than fifty have
got problems with lowered quality of sleep. The cause of lowered quality of sleep is i.a.
waking up early, lengthened sleep ...