Sansone, G. Sui tetraedri con quattro sfere tangenti inscritte. (Italian) Zbl 0165.54702 Period. Mat., IV. Ser. 46, 289-304 (1968). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:elementary geometry PDFBibTeX XMLCite \textit{G. Sansone}, Period. Mat., IV. Ser. 46, 289--304 (1968; Zbl 0165.54702)