New analysis of the Douglas-Herzberg system (A1Π- X1Σ+) in the CH+ ion radical - The A1Π- X1Σ+ system in the CH+R. Hakalla, R. Kępa, W. Szajna and M. ZachwiejaEur. Phys. J. D, 38 3 (2006) 481-488DOI: https://doi.org/10.1140/epjd/e2006-00063-9