1. College of Mathematics and Information Science, Xianyang Normal University, Xianyang, Shaanxi 712000, China
2. Government Bikram College of Commerce, Patiala, Punjab, India
3. Institute of Computer Technology and Information Security, Southern Federal University, Rostov-on-Don, Russia
4. Chitkara University, Chandigarh, India
5. Bakhtar University, Kabul, Afghanistan