@article{10_1017_S0017089500009617,
     author = {Brodski\u{i}, S. D. and Howie, James},
     title = {One-relator products of torsion-free groups},
     journal = {Glasgow mathematical journal},
     pages = {99--104},
     year = {1993},
     volume = {35},
     number = {1},
     doi = {10.1017/S0017089500009617},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500009617/}
}