M. Esmaeilzadeh and  H. Roohbakhsh and  A. Ghaedzadeh,  Experimental Study on Temperature Dependence of Absorption and Emission Properties of Yb:YAG Crystal as a Disk Laser Medium.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2012, vol. 63(3). 257 - 260
    [viewed 19 September 2019]. Available from: https://publications.waset.org/pdf/13958.