@article{10_37236_5684,
     author = {Sandie Han and Ariane M. Masuda and Satyanand Singh and Johann Thiel},
     title = {Orphans in forests of linear fractional transformations},
     journal = {The electronic journal of combinatorics},
     year = {2016},
     volume = {23},
     number = {3},
     doi = {10.37236/5684},
     zbl = {1339.05027},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/5684/}
}