1. Rigrod W.W., (1978), “Homogeneously broadened CW lasers with uniformly distributed loss”,IEEE J.Q.E.14, pp.377–381.
2. Schindler G.M., (1980), “Optimum output efficiency of homogeneously broadened lasers with constant loss”,IEEE J.Q.E. 16 pp.546–549
3. Maitland A. & Dunn A.H., (1969), “Laser Physics”, North Holland, Amsterdam.
4. Svelto O., (1982), “Principles of Lasers”, Plenum, New York, ( 2nd Edition ).
5. Siegman A.E., (1986), “Lasers”, University Science Books, Mill Valley, California.