@article{10_2307_121081,
     author = {Mark Feighn and Michael Handel},
     title = {Mapping tori of free group automorphisms are coherent},
     journal = {Annals of mathematics},
     year = {1999},
     volume = {149},
     number = {3},
     doi = {10.2307/121081},
     zbl = {0938.20022},
     url = {http://geodesic.mathdoc.fr/articles/10.2307/121081/}
}