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Ovchinnikov, A. A.; Flach, S.: Discrete Breathers in Systems with Homogenous Potentials: Analytic Solutions. Physical Review Letters 83, S. 248 - 251 (1999)

Ovchinnikov, Y. N.; Dyugaev, A. M.: Two energy scales and breakdown of renormalizability in the Kondo problem. JETP Letters 70, S. 111 - 116 (1999)

Pavlos, G. P.; Athanasiu, M. A.; Kugiumtzis, D.; Hatzigeorgiu, N.; Rigas, A. G.; Sarris, E. T.: Nonlinear analysis of magnetospheric data Part I. Geometric characteristics of the AE index time series and comparison with nonlinear surrogate data. Nonlinear Processes in Geophysics 6, S. 51 - 65 (1999)

Pavlos, G. P.; Athanasiu, M. A.; Kugiumtzis, D.; Hatzigeorgiu, N.; Rigas, A. G.; Sarris, E. T.: Nonlinear analysis of magnetospheric data Part II. Dynamical characteristics of the AE index time series and comparison with nonlinear surrogate data. Nonlinear Processes in Geophysics 6, S. 79 - 98 (1999)

Persson, E.; Rotter, I.: Doorway concept at high excitation energy. Physical Review C 59, S. 164 - 171 (1999)

Pietig, R.; Bulla, R.; Blawid, S.: Charge order transition in the extended Hubbard model. Physica B 261, S. 769 - 770 (1999)

Pietig, R.; Bulla, R.; Blawid, S.: Reentrant charge order transition in the extended Hubbard model. Physical Review Letters 82, S. 4046 - 4049 (1999)

Plakida, N. M.; Oudovenko, V. S.: Electron spectrum and superconductivity in the t-J model at moderate doping. Physical Review B 59, S. 11949 - 11961 (1999)

Pleutin, S.; Fave, J. L.: An excitonic method based on PPP Hamiltonian: application to the dimerization of polyenes. Synthetic Metals 101, S. 302 - 303 (1999)

Pleutin, S.; Fave, J. L.: The molecular crystal approach for pi-conjugated polymers: from the Pariser-Parr-Pople Hamiltonian to the Holstein model for polaron states. Journal of Physics: Condensed Matter 11, S. 9629 - 9645 (1999)

Raberto, M.; Scalas, E.; Cuniberti, G.; Riani, M.: Volatility in the Italian Stock Market: an Empirical Study. Physica A 269, S. 148 - 155 (1999)

Rödenbeck, C.; Karger, J.; Schmidt, H.; Rother, T.; Rödenbeck, M.: Network of characterizing functions for stationary populations. Physical Review E 60, S. 2737 - 2740 (1999)

Roller-Lutz, Z.; Wang, Y.; Lutz, H. O.; Saalmann, U.; Schmidt, R.: Strong temperature dependence of laser-enhanced charge transfer in collisions of sodium clusters with sodium atoms. Physical Review A 59, S. R 2555 - R 2558 (1999)

Rosciszewski, K.; Paulus, B.; Fulde, P.; Stoll, H.: Ab initio calculation of ground-state properties of rare-gas crystals. Physical Review B 60, S. 7905 - 7910 (1999)

Rost, J.-M.: Threshold Detachment of Negative Ions by Electron Impact. Physical Review Letters 82, S. 1652 - 1655 (1999)

Rost, J.-M.; Pattard, T.: Universal shape function for the double-ionization cross section of negative ions by electron impact. Journal of Physics B 32, S. L 457 - L 460 (1999)

Schautz, F.; Flad, H. J.: Quantum Monte Carlo study of the dipole moment of CO. Journal of Chemical Physics 110, S. 11700 - 11707 (1999)

Schliecker, G.; Kaiser, C.: Percolation on disordered mosaics. Physica A 269, S. 189 - 200 (1999)

Schliecker, G.; Klapp, S.: Why are the equilibrium properties of two-dimensional random cellular structures so similar? Europhysics Letters 48, S. 122 - 128 (1999)