Varandas, A J C Extrapolation to the complete-basis-set limit and the implications of avoided crossings: The X 1Sigma(g)+, B 1Delta(g), and B' 1Sigma(g)+ states of C2. [electronic resource] - The Journal of chemical physics Dec 2008 - 234103 p. digital Publication Type: Journal Article ISSN: 1089-7690 Standard No.: 10.1063/1.3036115 doi