Rosales I , Juarez-Arellano E A , Magana C R , Bucio L , Orozco E , Acta Crystallographica, Section E , 63 (2007) p.i99-i101, Incorporation of vanadium(V) into the rutile-type phase of GeO2: the solid, solution Ge0.74V0.21[box]0.05O2, Locality: synthetic