• Prevalence Study of Insomnia in Korea

• Hong Seung-Chul

• Shin Yoon-Kyung, Jeong Jong-Hyun, Han Jin-Hee, Lee Sung-Pil, Ohyon Maurice M.

• Korean Journal of Sleep Medicine   2003  Volume.5  No.1 25 ~ 34

• Sleep Research in Non-Mammalian Animals

• Lee Chung-Tai

• Kweon Yong-Sil

• Korean Journal of Sleep Medicine   2003  Volume.5  No.1 17 ~ 24

• Mammalian Sleep

• Hong Seung-Chul

• Lee Sung-Pil

• Korean Journal of Sleep Medicine   2003  Volume.5  No.1 9 ~ 16

• Comparative Theories of the Function of Sleep

• Hong Seung-Chul

• Lee Sung-Pil

• Korean Journal of Sleep Medicine   2003  Volume.5  No.1 3 ~ 8