SpringerLink (Online service), Retakh, V., Singer, I. M., & Etingof, P. The unity of mathematics: In honor of the ninetieth birthday of I.M. Gelfand.
Čikaški stil citiranja (17. izdanje)SpringerLink (Online service), Vladimir Retakh, I. M. Singer, i Pavel Etingof. The Unity of Mathematics: In Honor of the Ninetieth Birthday of I.M. Gelfand.
MLA način citiranja (8. izdanje)SpringerLink (Online service), et al. The Unity of Mathematics: In Honor of the Ninetieth Birthday of I.M. Gelfand.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.