1. Investigation of Waves Propagating in Isothermal Plasma around De Sitter Black Hole
  Hasan, M. K., & Ali, M. H. 2009, JKAS, 42, no. 5, pp. 107-123
2. Streaming Circumnuclear Gas of the Seyfert 2 Galaxy NGC 5728
  Son, D.-H., Hyung, S., Lee, S.-J., & Ferruit, P. 2009, JKAS, 42, no. 5, pp. 125-134