M. Genet, V. Brandel, M.P. Lahalle, E. Simoni. Transparent gel and xerogel of thorium phosphate: optical spectroscopy with: Nd$^{3+}$ Er$^{3+}$ Eu$^{3+}$ Cr$^{3+}$ and rhodamine 6G.
Sol-Gel Optics, Jul 1990, San Diego, United States. pp.194-199.
⟨in2p3-00022902⟩