TY - JOUR AU - Y Wu AU - Lu Deng C2 - Physical Review Letters DA - 2004-09-28 00:09:00 DO - https://doi.org/10.1103/PhysRevLett.93.143904 LA - en M1 - 93 PB - Physical Review Letters PY - 2004 TI - Ultra Slow Optical Solitons in a Cold Four-State Medium UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=840184 ER -