Bibliografía y Fuentes:

http://villagiulia.beniculturali.it/index.php?it/163/sala-25(09/03/2018)

http://www.etruriameridionale.beniculturali.it/index.php?it/187/il-santuario-di-portonaccio(09/03/2018)

https://books.google.com.mx/books?id=5BB5o2PnkpcC&pg=PA196-IA49&lpg=PA196-IA49&dq=Cabeza+de+Malavolta&source=bl&ots=pqsjzTPQ2r&sig=2qofETFY0pixNhTdmaQvpRb0ucY&hl=es&sa=X&ved=0ahUKEwi06uXk-ZfZAhWrwFQKHdjrCJ0Q6AEIQDAI#v=onepage&q=Cabeza%20de%20Malavolta&f=false(09/03/2018)

http://misteriosconxana.blogspot.mx/2016/03/portonaccio.html(09/03/2018)

http://thorns-meadow.com/bos/documents/82.html (09/03/2018)