• https://thesis.unipd.it/handle/20.500.12608/38741
• https://thesis.unipd.it/handle/20.500.12608/79503
• https://thesis.unipd.it/handle/20.500.12608/76380
• https://thesis.unipd.it/handle/20.500.12608/40431
• https://thesis.unipd.it/handle/20.500.12608/59818
• https://thesis.unipd.it/handle/20.500.12608/109774
• https://thesis.unipd.it/handle/20.500.12608/82691