@article{10_1090_jams_901,
     author = {Wilton, Henry},
     title = {Essential surfaces in graph pairs},
     journal = {Journal of the American Mathematical Society},
     pages = {893--919},
     publisher = {mathdoc},
     volume = {31},
     number = {4},
     year = {2018},
     doi = {10.1090/jams/901},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/jams/901/}
}