Celebratio Mathematica

K. I. Ap­pel and P. E. Schupp: “The con­jugacy prob­lem for the group of any tame al­tern­at­ing knot is solv­able,” Proc. Am. Math. Soc. 33 : 2 (1972), pp. 329–​336. MR 294460 Zbl 0243.​20036 article

W. Abikoff, K. Ap­pel, and P. Schupp: “Lift­ing sur­face groups to \( \mathrm{SL}(2,\mathbb{C}) \),” pp. 1–​5 in Klein­i­an groups and re­lated top­ics (Oaxte­pec, Mex­ico, 10–14 Au­gust 1981). Edi­ted by D. M. Gallo and R. M. Port­er. Lec­ture Notes in Math­em­at­ics 971. Spring­er (Ber­lin), 1983. MR 690272 Zbl 0531.​30037 incollection

K. I. Ap­pel and P. E. Schupp: “Artin groups and in­fin­ite Coxeter groups,” In­vent. Math. 72 : 2 (June 1983), pp. 201–​220. MR 700768 Zbl 0536.​20019 article

Con­tri­bu­tions to group the­ory, published as Con­temp. Math. 33. Issue edi­ted by K. I. Ap­pel, J. G. Ratcliffe, and P. E. Schupp. Amer­ic­an Math­em­at­ic­al So­ci­ety (Provid­ence, RI), 1984. Pa­pers ded­ic­ated to Ro­ger C. Lyn­don on the oc­ca­sion of his sixty-fifth birth­day. MR 767092 Zbl 0539.​00007 book

K. I. Ap­pel: “Ro­ger C. Lyn­don: A bio­graph­ic­al and per­son­al note,” pp. 1–​10 in Con­tri­bu­tions to group the­ory. Edi­ted by K. I. Ap­pel, J. G. Ratcliffe, and P. E. Schupp. Con­tem­por­ary Math­em­at­ics 33. Amer­ic­an Math­em­at­ic­al So­ci­ety (Provid­ence, RI), 1984. MR 767093 Zbl 0546.​01008 incollection

K. I. Ap­pel: “On Artin groups and Coxeter groups of large type,” pp. 50–​78 in Con­tri­bu­tions to group the­ory. Edi­ted by K. I. Ap­pel, J. G. Ratcliffe, and P. E. Schupp. Con­tem­por­ary Math­em­at­ics 33. Amer­ic­an Math­em­at­ic­al So­ci­ety (Provid­ence, RI), 1984. MR 767099 Zbl 0576.​20021 incollection