Bigelow, R.W.; Weagley, R.J.; Freund, H.-J.: Intense core-hole satellite structure in aromatic donor/acceptor molecules. Chemical Physics Letters 82 (2), pp. 305 - 310 (1981)

Freund, H.-J.; Bigelow, R. W.: Shake-up phenomena in D⁺-Ar-A^- structures: A CNDO/S equivalent-core study on N,N-dimethyl-p-nitroaniline in the vapor and condensed phases. Chemical Physics 55 (3), pp. 407 - 427 (1981)

Freund, H.-J.; Plummer, E. W.: Explanation of the satellite structure observed in the photoemission spectra of coordinated CO. Physical Review B 23 (10), pp. 4859 - 4878 (1981)

Freund, H.-J.; Plummer, E. W.; Salaneck, W. R.: Summary Abstract: An XPS study of "intensity borrowing" in core ionizations of CO upon coordination to transition metal atoms. Journal of Vacuum Science and Technology 18 (2), pp. 464 - 465 (1981)

Freund, H.-J.; Plummer, E. W.; Salaneck, W. R.; Bigelow, R. W.: An XPS study of intensity borrowing in core ionization of free and coordinated CO. The Journal of Chemical Physics 75 (9), pp. 4275 - 4284 (1981)

Saddei, D.; Freund, H.-J.; Hohlneicher, G.: Zur elektronischen struktur von trans-chloro-methylcarbin-tetracarbonyl-chrom ClCr(CO)₄CCH₃. Journal of Organometallic Chemistry 216 (2), pp. 235 - 243 (1981)

Saddei, D.; Freund, H.-J.; Hohlneicher, G.: Calculation of transition metal compounds using an extension of the CNDO formalism. V. many body effects in the inner valence shell photoionization spectra of free and coordinated carbon monoxide. Chemical Physics 55 (3), pp. 339 - 354 (1981)

Saddei, D.; Freund, H.-J.; Hohlneicher, G.: Calculation of Transition Metal Compounds Using an Extension of the CNDO Formalism: VII. Simple Interpretation of Many-body effects in the Core Photoionization of Adsorbates by the Study of CO/Ni and N₂/Ni Model Systems. Surface Science Volume 102 (2–3), pp. 359 - 378 (1981)

Salaneck, W. R.; Bigelow, R. W.; Freund, H.-J.; Plummer, E. W.: X-ray photoelectron spectroscopy of gaseous and solid I₂: Ion-state-enhanced intermolecular interactions. Physical Review B 24 (5), pp. 2403 - 2411 (1981)

Scheffler, M.; Pantelides, S. T.; Lipari, N. O.; Bernholc, J.: Identification and properties of native defects in GaP. Physical Review Letters 47, p. 413 (1981)

Freund, H.-J.; Dick, B.; Hohlneicher, G.: Calculation of Transition Metal Compounds Using an Extension of the CNDO-Formalism, II. Metal to Metal Bonding in Binuclear Transition Metal Compounds. Theoretica Chimica Acta 57 (3), pp. 181 - 207 (1980)

Hora, R.; Scheffler, M.: Photoemission and the electronic structure of a c(2x2) sulfur adsorbate-layer on Pd. Proceedings of the 4th International Conference on Solid Surfaces and the 3rd European Conf. on Surf. Sci. (1980)

Saddei , D.; Freund, H.-J.; Hohlneicher, G.: Calculation of transition metal compounds using an extension of the CNDO formalism: VI. Simple interpretation of many-body effects in the valence shell photoionization of adsorbates by the study of CO/Ni and N₂/Ni model systems. Surface Science 95 (2-3), pp. 527 - 554 (1980)

Saddei, D.; Freund, H.-J.; Hohlneicher, G.: Calculation of Transition Metal Compounds Using an Extension of the CNDO Formalism, III. Application to the CO-insertion Reaction as an Example for Mechanistic Studies. Journal of Organometallic Chemistry 186 (1), pp. 63 - 75 (1980)

Salaneck, W. R.; Duke, C. B.; Eberhardt, W.; Plummer, E. W.; Freund, H.-J.: Temperature-Dependent Ultraviolet Photoemission Linewidths of Molecular Solids: Isopropyl Benzene. Physical Review Letters 45 (4), pp. 280 - 283 (1980)

Thomas, J. M.; Millward, G. R.; Schlögl, R.; Boehm, H. P.: Direct imaging of a graphite intercalate: Evidence of interpenetration of ‘stages’ in graphite: Ferric chloride. Materials Research Bulletin 15 (5), pp. 671 - 676 (1980)

Bradshaw, A. M.; Scheffler, M.: Lateral interactions in adsorbed layers. J. Vac. Sci. Tech. 16, pp. 447 - 454 (1979)

Freund, H.-J.; Hohlneicher, G.: Comparative Study of Adsorbate Systems and Corresponding Compounds Using X-Ray and UV-Photoemission I. Hexagonal (0001) Co/CO, O₂ versus Oxides and Carbonyls. Berichte der Bunsen-Gesellschaft 83 (2), pp. 100 - 108 (1979)

Freund, H.-J.; Hohlneicher, G.: Calculation of Transition Metal Compounds Using an Extension of the CNDO Formalism, I. Method of Calculation and Application to Mono-, Di- and Tetranuclear compounds. Theoretica Chimica Acta 51 (2), pp. 145 - 162 (1979)

Hoffmann, P.; Muschwitz, C. v.; Horn, K.; Jacobi, K.; Bradshaw, A. M.; Kambe, K.; Scheffler, M.: Angular-resolved photoemission from an ordered oxygen overlayer on aluminium (111). Surface Science 89 (1-3), p. 327 (1979)