H. Hashim and  B. F. Usher,  The Incorporation of In in GaAsN as a Means of N Fraction Calibration.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2011, vol. 57(9). 774 - 779
    [viewed 18 January 2020]. Available from: https://publications.waset.org/pdf/15068.