Fermi, Enrico (1926). "Sulla quantizzazione del gas perfetto monoatomico". Rendiconti Lincei (dalam bahasa Italian). 3: 145–9.Pemeliharaan CS1: Bahasa yang tidak diketahui (link) , translated as Zannoni, Alberto (transl.) (1999-12-14). "On the Quantization of the Monoatomic Ideal Gas". arΧiv:cond-mat/9912229 [cond-mat.stat-mech].