@incollection{SB_1975-1976__18__167_0,
     author = {Stallings, John},
     title = {Coherence of $3$-manifold fundamental groups},
     booktitle = {S\'eminaire Bourbaki : vol. 1975/76, expos\'es 471-488},
     series = {S\'eminaire Bourbaki},
     note = {talk:481},
     pages = {167--173},
     publisher = {Springer-Verlag},
     number = {18},
     year = {1977},
     mrnumber = {442915},
     zbl = {0388.20028},
     language = {en},
     url = {http://www.numdam.org/item/SB_1975-1976__18__167_0/}
}