Zhu, Y. (1992). Lasing without inversion in a closed three-level system
.
PHYSICAL REVIEW A, 45(9), 10.1103/PhysRevA.45.R6149
Zhu, Y. (1992). Lasing without inversion in a closed three-level system
. PHYSICAL REVIEW A, 45(9), 10.1103/PhysRevA.45.R6149