V. Y. Suzuki, N. H. de Paula, R. Gonçalves, M. S. Li, E. C. Pereira, E. Longo, F. A. La Porta. Exploring effects of microwave-assisted thermal annealing on optical properties of Zn₂GeO₄ nanostructured films, Materials Science and Engineering B 246, 7-12 (2019).