• https://unitesi.unipv.it/handle/20.500.14239/12373
• https://unitesi.unipv.it/handle/20.500.14239/18751
• https://unitesi.unipv.it/handle/20.500.14239/9930
• https://unitesi.unipv.it/handle/20.500.14239/7869
• https://unitesi.unipv.it/handle/20.500.14239/10182
• https://unitesi.unipv.it/handle/20.500.14239/18510