[6] Rauschenbach I, Lazic V, Pavlov S G, et al. Spectrochimica Acta Part B: Atomic Spectroscopy, 2008, 63(10): 1205.
[7] Rapin W, Bousquet B, Lasue J, et al. Spectrochimica Acta Part B: Atomic Spectroscopy, 2017, 137: 13.
[8] Klus J, Poízka, et al. Spectrochimica Acta Part B: Atomic Spectroscopy, 2016, 126: 6.