[1] | Riehardson M C et al.,IEEE J, Q, E.,1973; QE-9; 934 |
[2] | Pace P, Laeombe M, Opt,Commun.,1978;26; 405 |
[3] | Marchetti R et al.,IEEE J, Q E.,1983;QE-9; 1488 |
[1] | Riehardson M C et al.,IEEE J, Q, E.,1973; QE-9; 934 |
[2] | Pace P, Laeombe M, Opt,Commun.,1978;26; 405 |
[3] | Marchetti R et al.,IEEE J, Q E.,1983;QE-9; 1488 |