References
- C.BarrientosS.MinionAlpha labelings of snake polyominoes and hexagonal chainsBull. Inst. Combin. Appl.7420157383
- D.FroncekO.KingstonK.VezinaAlpha labelings of straight simple polyominal caterpillarsCongr. Numer.22220145764
- A.RosaOn certain valuations of the vertices of a graphTheory of Graphs (Intl. Symp. Rome 1966)1967Gordon and BreachDunod, Paris349355
- J.GallianA dynamic survey of graph labelingElectron. J. Combin.222014# DS6