@article{10_4064_fm226_3_5,
     author = {Paul Blanchard and Daniel Cuzzocreo and Robert L. Devaney and Elizabeth Fitzgibbon and Stefano Silvestri},
     title = {A dynamical invariant for {Sierpi\'nski} cardioid {Julia} sets},
     journal = {Fundamenta Mathematicae},
     pages = {253--277},
     publisher = {mathdoc},
     volume = {226},
     number = {3},
     year = {2014},
     doi = {10.4064/fm226-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm226-3-5/}
}