SOLAINI, LUIGI. “CRITERI E PROBLEMI COSTRUTTIVI DI STRUMENTI PER MISURE DI RESISTIVITÀ”. Annals of Geophysics 5, no. 3 (November 25, 1952): 357–365. Accessed April 24, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/5849.