H.-S. Kitzerow and P. P. Crooker, “Polymer-dispersed cholesteric liquid crystals - challenge for research and application,”10.1080/00150199108226040__Ferroelectrics, vol. 122, no. 1, pp. 183–196, 1991, doi:10.1080/00150199108226040 .

H.-S. Kitzerow, P. Crooker, and G. Heppke, “Line shapes of field-induced blue-phase-III selective reflections,”10.1103/physrevlett.67.2151__Physical Review Letters, vol. 67, no. 16, pp. 2151–2154, 1991, doi:10.1103/physrevlett.67.2151 .

H.-S. Kitzerow, B. Jérôme, and P. Pieranski, “Strain-induced anchoring transitions,”10.1016/0378-4371(91)90423-a__Physica A: Statistical Mechanics and its Applications, vol. 174, no. 1, pp. 163–194, 1991, doi:10.1016/0378-4371(91)90423-a .

H.-S. Kitzerow, “The Effect of Electric Fields on Blue Phases,”10.1080/00268949108035659__Molecular Crystals and Liquid Crystals, vol. 202, no. 1, pp. 51–83, 1991, doi:10.1080/00268949108035659 .

H.-S. Kitzerow, H. Schmid, and G. Heppke, “Chirale Flüssigkristalle - Selektive Reflexion in Phasen ohne Spiegelsymmetrie,” Labor 2000, Sonderausgabe der Zeitschrift LaborPraxis, Vogel Verlag, München, pp. 6–11, 1991.

K. Huber, “Interactions in mixed interfaces of binary surfactant solutions,”10.1016/0021-9797(91)90164-4__Journal of Colloid and Interface Science, vol. 147, no. 2, pp. 321–332, 1991, doi:10.1016/0021-9797(91)90164-4 .

K. Huber, “Calcium-induced shrinking of polyacrylate chains in aqueous solution,”10.1021/j100140a046__The Journal of Physical Chemistry, vol. 97, no. 38, pp. 9825–9830, 1991, doi:10.1021/j100140a046 .

H. Schroeter-Wittke, “Letzter Sonntag nach Epiphanias; Predigttext: 2. Korinther 4,6-10,” in Gottesdienstpraxis. Serie A. II. Perikopenreihe Band 1, vol. 132–139, H. Nitschke, Ed. Gütersloh: Gütersloher Verlagshaus, 1991.

B. Herzig, “Definite Clause Grammars (DCG´s) zur Sprachanalyse. Eine Einführung in GRAMCOM, eine Benutzeroberfläche zur Analyse formaler und natürlicher Sprachen mit Hilfe von DCG´s,” in Neue Fragen der Linguistik. Bd. 2: Innovation und Anwendung, E. Feldbusch, R. Pogarell, and C. Weiß, Eds. Tübingen: Max Niemeyer Verlag, 1991, pp. 467–472.

V. Peckhaus, Hilbertprogramm und Kritische Philosophie. Das Göttinger Modell interdisziplinärer Zusammenarbeit zwischen Mathematik und Philosophie, vol. 7. Göttingen: Vandenhoeck &; Ruprecht, 1990.

V. Peckhaus, “,Ich habe mich wohl gehütet, alle Patronen auf einmal zu verschießen‘. Ernst Zermelo in Göttingen,” History and Philosophy of Logic, vol. 11, pp. 19–58, 1990.

V. Peckhaus, Fotografie: Joachim Schulte (Erlangen, 21.2.1990), Katalog Suhrkamp Wissenschaft. Neuerscheinungen 2. Halbjahr 1990. Frankfurt a. M.: Suhrkamp, 1990.

S. Krauter and R. Hanitsch, “The Influence of the Capsulation on the Efficiency of PV-Modules.,” in Proceedings of the 1st World Renewable Energy Congress, Reading (UK), 23.–28. September 1990, Band 1, S. 141–144., Reading (UK), 1990.

R. Haeb-Umbach, D. Rugar, T. Howell, and G. P. Coleman, “Coding and Signal Processing for a Magneto-optic Resonant Bias Coil Overwrite Experiment,” in International Conference on Communication, Atlanta, 1990.

M. Gochin, A. Pines, M. E. Rosen, S. P. Rucker, and C. Schmidt, “Two-dimensional N.M.R. studies of flexible molecules in liquid crystals: orientational order and conformational probabilities ofn-hexane,”10.1080/00268979000100501__Molecular Physics, vol. 69, no. 4, pp. 671–695, 1990, doi:10.1080/00268979000100501 .

C. Schmidt, S. R. Rucker, D. Caplan, M. F. Quinton, and A. Pines, “NMR of Oriented Flexible Molecules,”10.1007/978-3-642-76072-3__in 25th Congress Ampere on Magnetic Resonance and Related Phenomena, 1990, doi:10.1007/978-3-642-76072-3 .

G. Heppke, H.-S. Kitzerow, D. Lötzsch, and Ch. Papenfuß, “Blue phase mixtures exhibiting low fractions of a chiral compound experimental observation of some unusual properties,”10.1080/02678299008047356__Liquid Crystals, vol. 8, no. 3, pp. 407–418, 1990, doi:10.1080/02678299008047356 .

R. Noé, H. RODLER, G. GAUKEL, B. NOLL, and A. EBBERG, “HIGH-PERFORMANCE, 2-CHANNEL OPTICAL FSK HETERODYNE SYSTEM WITH POLARIZATION DIVERSITY RECEIVER,”10.1049/el:19900717__ELECTRONICS LETTERS, vol. 26, no. 15, pp. 1109–1110, 1990, doi:10.1049/el:19900717 .

H.-S. Kitzerow, P. P. Crooker, S. L. Kwok, J. Xu, and G. Heppke, “Dynamics of blue-phase selective reflections in an electric field,”10.1103/physreva.42.3442__Physical Review A, vol. 42, no. 6, pp. 3442–3448, 1990, doi:10.1103/physreva.42.3442 .

H.-S. Kitzerow, P. P. Crooker, S. L. Kwok, and G. Heppke, “A blue phase with negative dielectric anisotropy in an electric field. Statics and dynamics,”10.1051/jphys:0199000510120130300__Journal de Physique, vol. 51, no. 12, pp. 1303–1312, 1990, doi:10.1051/jphys:0199000510120130300 .