3dnd J = 4,5 autoionizing levels in Ca: laser optogalvanic spectroscopy and theoretical analysisS. Assimopoulos, A. Bolovinos, E. Luc-Koenig, S. Cohen, A. Lyras, P. Tsekeris and M. AymarEur. Phys. J. D, 1 3 (1998) 243-254DOI: https://doi.org/10.1007/s100530050089