L-shell fluorescence cross-sections and relative intensities for La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb, and Lu at 16.9 keVW. SalahEur. Phys. J. AP, 19 1 (2002) 69-74DOI: https://doi.org/10.1051/epjap:2002050