@article{DMGT_2021_41_3_a1,
     author = {Araujo-Pardo, Gabriela and Montellano-Ballesteros, Juan Jos\'e and Olsen, Mika and Rubio-Montiel, Christian},
     title = {Achromatic {Numbers} for {Circulant} {Graphs} and {Digraphs}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {713--724},
     publisher = {mathdoc},
     volume = {41},
     number = {3},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2021_41_3_a1/}
}