1. Zs. Bor: IEEE J. Quant. Electron. (submitted)
2. Zs. Bor: Opt. Commun. (submitted)
3. Springer Series in Chemical Physics,1978
4. C. V. Shank, J. E. Bjorkholm, H. Kogelnik: Appl. Phys. Lett.18, 395–396 (1971)
5. A. N. Rubinov, T. Sh. Efendiev: Zh. Prikl. Spektr.27, 634 (1977)