Stringham, Irving (1880). "Regular Figures in n-Dimensional Space". American Journal of Mathematics. 3 (1): 1–14. doi:10.2307/2369244. JSTOR2369244.
Stringham, Irving (1881). "Determination of the Finite Quaternion Groups". American Journal of Mathematics. 4 (4): 345–357. doi:10.2307/2369291. JSTOR2369291.
Stringham, Irving (1880). "Regular Figures in n-Dimensional Space". American Journal of Mathematics. 3 (1): 1–14. doi:10.2307/2369244. JSTOR2369244.
Stringham, Irving (1881). "Determination of the Finite Quaternion Groups". American Journal of Mathematics. 4 (4): 345–357. doi:10.2307/2369291. JSTOR2369291.
O'Connor, J. J.; Robertson, Edmund F. "Irving Stringham". MacTutor History of Mathematics Archive. University of St Andrews. Diakses tanggal 25 Juni 2025.