Celebratio Mathematica

I. Daubech­ies and S. Maes: “An ap­plic­a­tion of a for­mula of Al­berto Calderón to speak­er iden­ti­fic­a­tion,” Chapter 10, pp. 163–​181 in Har­mon­ic ana­lys­is and par­tial dif­fer­en­tial equa­tions: Es­says in hon­or of Al­berto P. Calderón’s 75th birth­day (Chica­go, Feb­ru­ary 1996). Edi­ted by M. Christ, C. E. Kenig, and C. Sa­d­osky. Chica­go Lec­tures in Math­em­at­ics. Uni­versity of Chica­go Press, 1999. MR 1743861 Zbl 1006.​92500 incollection