Heppke, G., B. Jérôme, Heinz-Siegfried Kitzerow, and P. Pieranski. “Electrostriction of the Cholesteric Blue Phases BPI and BPII in Mixtures with Positive Dielectric Anisotropy.”https://doi.org/10.1051/jphys:0198900500190299100__Journal de Physique 50, no. 19 (1989): 2991–98.https://doi.org/10.1051/jphys:0198900500190299100 .

Heppke, G., B. Jérôme, Heinz-Siegfried Kitzerow, and P. Pieranski. “Electrostriction of BPI and BPII for Blue Phase Systems with Negative Dielectric Anisotropy.”https://doi.org/10.1051/jphys:01989005005054900__Journal de Physique 50, no. 5 (1989): 549–62.https://doi.org/10.1051/jphys:01989005005054900 .

Halstead, Thomas K., Claudia Schmidt, Hans W. Spiess, Robert Schoellhorn, Werner Mueller-Warmuth, and H. Moeller. “Magnetic-Field-Induced Orientation of Crystallites in Powders of Layered Intercalation Compounds Detected by NMR.”https://doi.org/10.1021/j100337a003__The Journal of Physical Chemistry 92, no. 26 (1988): 7167–68.https://doi.org/10.1021/j100337a003 .

Schmidt, Claudia, B Blümich, and H.W Spiess. “Deuteron Two-Dimensional Exchange NMR in Solids.”https://doi.org/10.1016/0022-2364(88)90219-3__Journal of Magnetic Resonance (1969) 79, no. 2 (1988): 269–90.https://doi.org/10.1016/0022-2364(88)90219-3 .

Kitzerow, Heinz-Siegfried, G. Heppke, F. Oestreicher, Heinz-Siegfried Kitzerow, and M. Krumrey. “Blue Phase Liquid Crystal System, Method of Operation and Its Use ,” 1988.

Heppke, G., Heinz-Siegfried Kitzerow, F. Oestreicher, S. Quentel, and A. Ranft. “Electrooptic Effect in a Non-Polar Nematic Discotic Liquid Crystal.”https://doi.org/10.1080/01406566.1988.10767023__Molecular Crystals and Liquid Crystals Letters 6, no. 3 (1988): 71–79.https://doi.org/10.1080/01406566.1988.10767023 .

Schmidt, Claudia, B. Blümich, S. Wefing, S. Kaufmann, and H. W. Spiess. “Molecular Motions from Two-Dimensional NMR of Powders: Comparison of Rotational Jumps and Diffusive Reorientations.”https://doi.org/10.1002/bbpc.19870911113__Berichte Der Bunsengesellschaft Für Physikalische Chemie 91, no. 11 (1987): 1141–45.https://doi.org/10.1002/bbpc.19870911113 .

Heppke, G., Heinz-Siegfried Kitzerow, and M. Krumrey. “Angular Dependence of Blue Phase Selective Reflection in the Electric Field.”https://doi.org/10.1080/00268948708074802__Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics 150, no. 1 (1987): 265–76.https://doi.org/10.1080/00268948708074802 .

Schmidt, Claudia, S. Wefing, B. Blümich, and H.W. Spiess. “Dynamics of Molecular Reorientations: Direct Determination of Rotational Angles from Two-Dimensional NMR of Powders.”https://doi.org/10.1016/0009-2614(86)80431-6__Chemical Physics Letters 130, no. 1–2 (1986): 84–90.https://doi.org/10.1016/0009-2614(86)80431-6 .

Heppke, G., F. Oestreicher, Heinz-Siegfried Kitzerow, and M. Krumrey. “Optisches System Mit Einer Flüssigkristallzelle, Verfahren Zu Seinem Betrieb Und Seine Verwendung,” 1986.

Schmidt, Claudia, Karl J. Kuhn, and Hans W. Spiess. “Distribution of Correlation Times in Glassy Polymers From Pulsed Deuteron NMR.” Progress in Colloid and Polymer Science 71 (1985): 71–76.

HEPPKE, G, Heinz-Siegfried Kitzerow, and M KRUMREY. “ELECTROOPTICAL BEHAVIOR OF CHOLESTERIC BLUE PHASES WITH NEGATIVE DIELECTRIC ANISOTROPY.” MOLECULAR CRYSTALS AND LIQUID CRYSTALS 1, no. 3–4 (1985): 117–22.

HEPPKE, G, Heinz-Siegfried Kitzerow, and M KRUMREY. “ELECTRIC-FIELD INDUCED VARIATION OF THE REFRACTIVE-INDEX IN CHOLESTERIC BLUE PHASES.” MOLECULAR CRYSTALS AND LIQUID CRYSTALS 2, no. 1–2 (1985): 59–65.