1. Askandar K. Kaka, "Wind Energy in Haybet Sultan Region of Koya Town", Journal of Koya University,No. 24, September 2012
  2. Askandar K. Kaka, "Calculation Methods of the Length, Area and Volume of Iterated Function System Fractals", Journal of Koya University,No. 26, February 2013
  3. Mohammed T. Hussein, Thekra Kasim, Mudar A. Abdulsattar and Askandar K. Kaka, "Density Functional Theory Study of InP Quantum Dot and Oxidized Surface", International Journal of application or innovation in engineering and management, Vol. 3, Issue 5, pp 1-8, May 2014.
  4. Mohammed T. Hussein, Thekra K. Abd Al Raheem, and Askandar K. Kaka, "Study the Electronic Structure of In1-xAlxP with Variable Concentration of Aluminum Using Density Functional Theory", International Journal of Thermal Technologies, Vol. 5, No. 1, pp 18-22, March 2015.
  5. Askander K. Kaka and Akram H. Taha, "The Electronic Properties Simulation of Indium Nitride (InN) wurtzite Nanocrystal Using Density Functional Theory with Generalized Gradient Approximation", International Journal of Advanced Research, Vol. 4, No. 1, pp 1493-1500 , October 2016 .
  6. Askandar K. Kaka, "Theoretical Study of the Electronic Structure of Aluminum Nitride Wurtzite (AlN) Nanocrystal Using Density Functional Theory Coupled with Large Unit Cell Method", Journal of Chemical, Biological and Physical Sciences, Vol. 7, No. 1, pp 47-55, November 2016 .