@article{weko_769_1, author = "Talukder,Aminul and Amagishi,Yoshimitsu and Tomita,Makoto", title = "Superluminal to subluminal transition in the pulse propagation in a resonantly absorbing medium", journal = "Physical Review Letters", year = "2001", volume = "86", number = "16", pages = "3546--3549", month = "apr" }