The burning of Gondwana: permian fires on the southern continent—A palaeobotanical approach - Jasper, André; Guerra-Sommer, Margot; Hamad, Abdalla M. B. Abu; Bamford, Marion; Bernardes-de-Oliveira, Mary Elizabeth Cerruti; Tewari, Rajni; Uhl, Dieter (Gondwana research, 2013)