Costantini, Edoardo A.C. (ed.); Dazzi, Carmelo (ed.). The soils of Italy. Dordrecht: Springer. 2013: 30,78,80,83,255,283 [26 November 2015]. ISBN 978-9400756410. (原始内容存档于2020-08-27).
Costantini, Edoardo A.C. (ed.); Dazzi, Carmelo (ed.). The soils of Italy. Dordrecht: Springer. 2013: 30,78,80,83,255,283 [26 November 2015]. ISBN 978-9400756410. (原始内容存档于2020-08-27).