1. M. Born, R. Oppenheimer: Ann. Phys. (Leipzig) 84, 457 (1927)
2. G. Benedek: Surface Lattice Dynamics. Dynamic Aspects of Surface Physics, LV III Corso (Editrice Compositori, Bologna 1974) p. 605: A.A. Maradudin, R.F. Wallis, L. Dobrzinski: Handbook of Surface and Interfaces III, Surface Phonons and Polaritons (Garland STPM Press, New York 1980)
3. Springer Ser. Wave Phen.;L.M. Brekhovskikh,1990
4. Springer Ser. Wave Phen.;L.M. Brekhovskikh,1994
5. Springer Ser. Wave Phen.,1985