IC 4663: the first unambiguous [WN] Wolf-Rayet central star of a planetary nebula

Petrescu-Mag Ioan Valentin: Bioflux, Cluj-Napoca (Romania) Petrescu Dacinia Crina: UBB Cluj, Cluj-Napoca (Romania) Sima Rodica Maria: USAMV Cluj, Cluj-Napoca (Romania)

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● Cool central star and metal deficient nebula, Cool central star and metal deficient nebula, about MC metallicity about MC metallicity ● The origin (i.e., The origin (i.e.,

The chromatic index of the decomposition, denoted χ  ( D), is the minimum number of colors required to color each block in the decomposition so that blocks that share a common node

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This suggests that although police forces in many European countries see their role in enforcing compliance with seat belt laws as minimal at best, due to the belief that