title: Ultraslow bright and dark optical solitons in a cold three-state medium.
authors.affiliation: State Key Laboratory for Laser Technique and Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China. yingwu2@eyou.com
authors.forename: Ying
authors.initials: Y
authors.lastname: Wu
authors.forename: Lu
authors.initials: L
authors.lastname: Deng