NAYAK, Bijan Bihari; DASH, Tapan; MISHRA, Barada Kanta. Purple Coloured Natural Ruby: X-ray Photoelectron Spectroscopy, X-ray Diffraction, X-ray Tomography and Other Microstructural Characterizations. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 25, n. 2, p. 94–114, 2016. Disponível em: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/5123. Acesso em: 8 feb. 2026.