Júlio Araújo, Cláudia Linhares Sales. 4's. Discrete Applied Mathematics, 160(18):2514-2522, 2012. [doi]
@article{AraujoS12-1,
title = {4's},
author = {Júlio Araújo and Cláudia Linhares Sales},
year = {2012},
doi = {10.1016/j.dam.2011.08.016},
url = {http://dx.doi.org/10.1016/j.dam.2011.08.016},
researchr = {https://researchr.org/publication/AraujoS12-1},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {160},
number = {18},
pages = {2514-2522},
}