@article{AFST_2007_6_16_3_561_0,
     author = {de la Harpe, Pierre and Pr\'eaux, Jean-Philippe},
     title = {Groupes fondamentaux des vari\'et\'es de dimension $3$ et alg\`ebres d{\textquoteright}op\'erateurs},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {561--589},
     publisher = {Universit\'e Paul Sabatier, Institut de math\'ematiques},
     address = {Toulouse},
     volume = {6e s{\'e}rie, 16},
     number = {3},
     year = {2007},
     doi = {10.5802/afst.1159},
     mrnumber = {2379052},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.5802/afst.1159/}
}