@article{JIS_2017__20_4_a6,
     author = {Balchin, Scott and Rust, Dan},
     title = {Computations for symbolic substitutions},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2017__20_4_a6/}
}