@article{10_1017_S0017089519000168,
     author = {HEIL, SIMON},
     title = {JSJ {DECOMPOSITIONS} {OF} {DOUBLES} {OF} {FREE} {GROUPS}},
     journal = {Glasgow mathematical journal},
     pages = {367--382},
     year = {2020},
     volume = {62},
     number = {2},
     doi = {10.1017/S0017089519000168},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089519000168/}
}