Celebratio Mathematica

P. Baum and R. G. Douglas: “\( K \) ho­mo­logy and in­dex the­ory,” pp. 117–​173 in Op­er­at­or al­geb­ras and ap­plic­a­tions (King­ston, ON, 14 Ju­ly–2 Au­gust 1980), part 1. Edi­ted by R. V. Kadis­on. Pro­ceed­ings of Sym­po­sia in Pure Math­em­at­ics 38. Amer­ic­an Math­em­at­ic­al So­ci­ety (Provid­ence, RI), 1982. MR 679698 Zbl 0532.​55004 incollection

P. Baum, R. G. Douglas, and M. E. Taylor: “Cycles and re­l­at­ive cycles in ana­lyt­ic \( K \)-ho­mo­logy,” J. Diff. Geom. 30 : 3 (1989), pp. 761–​804. MR 1021372 Zbl 0697.​58050 article