Celebratio Mathematica

incollection S. S. Chern and R. S. Hamilton: “On Rieman­ni­an met­rics ad­ap­ted to three-di­men­sion­al con­tact man­i­folds,” pp. 279–​308 in Arbeit­sta­gung Bonn 1984 [Work­shop Bonn 1984] (Max-Planck-In­sti­tut für Math­em­atik, Bonn, 15–24 June 1984). Edi­ted by F. Hirzebruch, J. Schwer­mer, and S. Suter. Lec­ture Notes in Math­em­at­ics 1111. Spring­er (Ber­lin), 1985. With an ap­pendix by Alan Wein­stein. MR 797427 Zbl 0561.​53039