1999 article
Scanning electron microscopy and cathodoluminescence study of the epitaxial lateral overgrowth (ELO) process for gallium nitride
Johnson, M. A. L., Yu, Z. H., Brown, J. D., El-Masry, N. A., Cook, J. W., & Schetzina, J. F. (1999, March). JOURNAL OF ELECTRONIC MATERIALS, Vol. 28, pp. 295β300.