Celebratio Mathematica

I. M. Sing­er: “On the mas­ter field in two di­men­sions,” pp. 263–​281 in Func­tion­al ana­lys­is on the eve of the 21st cen­tury: In hon­or of the eighti­eth birth­day of I. M. Gel­fand (New Brun­swick, NJ, 24–27 Oc­to­ber 1993), vol. 1. Edi­ted by S. Gindikin, J. Lepowsky, and R. L. Wilson. Pro­gress in Math­em­at­ics 131. Birkhäuser (Bo­ston), 1995. MR 1373007 Zbl 0861.​53075 incollection

I. M. Sing­er: “Trib­ute to I. M. Gel­fand for his 80th birth­day cel­eb­ra­tion,” pp. xix–​xxii in Func­tion­al ana­lys­is on the eve of the 21st cen­tury: In hon­or of the eighti­eth birth­day of I. M. Gel­fand (New Brun­swick, NJ, 24–27 Oc­to­ber 1993), vol. 1. Edi­ted by S. Gindikin, J. Lepowsky, and R. L. Wilson. Pro­gress in Math­em­at­ics 132. Birkhäuser (Bo­ston), 1996. MR 1389018 Zbl 0841.​01019 incollection