Climate variability and Germanic settlement dynamics in the Middle Danube region during the Roman Period (1st–4th Century CE) - Marek Vlach; Balázs Komoróczy; Max Carl Arne Torbenson; Jan Esper; Rudolf Brázdil; Ulf Büntgen; Daniela Semerádová; Otmar Urban; Jan Balek; Tomáš Kolář; Michal Rybníček; Miroslav Trnka (PLoS ONE)