Pier della Vigna. Letters in 5 books: Critical edition of the oldest systematic collection, by Debora Riso. Introduction by Fulvio Delle Donne [Internet]. Riso D, editor. SHARE Books; 2024 [cited 2026 Sep. 19]. (, editor. Miscellaneous). Available from: https://www.fedoabooks.unina.it/index.php/fedoapress/catalog/book/978-88-98943-78-4