Optical Spectra of Amblygonite, LiAl(PO₄)F

• Platonov AN, Tarashchan AN (1973) Optical spectroscopy of vanadium in natural minerals. III. Absorption spectra of vanadium(4+) and vanadium(3+) complexes. Konstitutsiya i Svoistva Mineralov 7, 75-81. In Russian

• Platonov (1976) The nature of the color of minerals. Naukova Dumka, Kiev (in Russian)