3-dynamic coloring of planar triangulations.
Yoshihiro Asayama, Yuki Kawasaki, Seog-Jin Kim, Atsuhiro Nakamoto and Kenta Ozeki
Discret. Math.
341
11
2988
2994
10.1016/j.disc.2018.07.020
https://dblp.uni-trier.de/db/journals/dm/dm341.html#AsayamaKKNO18