Gianfranceschi, G. De theoria physica circa “quanta”. (Italian) JFM 52.0982.05 Memorie Pontificia Accad. (2) 9, 9-25 (1926). PDF BibTeX XML Cite \textit{G. Gianfranceschi}, Memorie Pontificia Accad. (2) 9, 9--25 (1926; JFM 52.0982.05)