@articleHeppke_Kitzerow_Lötzsch_Papenfuß_1990, title=Blue phase mixtures exhibiting low fractions of a chiral compound experimental observation of some unusual properties, volume=8, DOI=10.1080/02678299008047356, number=3, journal=Liquid Crystals, publisher=Informa UK Limited, author=Heppke, G. and Kitzerow, Heinz-Siegfried and Lötzsch, D. and Papenfuß, Ch., year=1990, pages=407–418 

@articleNoé_ZAH_MAEDA_CANEAU_MENOCAL_WAGNER_LEE_1990, title=OPTICAL AMPLIFIER WITH 27-DB DYNAMIC-RANGE IN A COHERENT TRANSMISSION-SYSTEM, volume=2, DOI=10.1109/68.47067, number=2, journal=IEEE PHOTONICS TECHNOLOGY LETTERS, author=Noé, Reinhold and ZAH, CE and MAEDA, M and CANEAU, C and MENOCAL, SG and WAGNER, RE and LEE, TP, year=1990, pages=120–121 

@articleNoé_ZAH_MAEDA_CANEAU_MENOCAL_WAGNER_LEE_1990, title=OPTICAL AMPLIFIER WITH 27-DB DYNAMIC-RANGE IN A COHERENT TRANSMISSION-SYSTEM, volume=2, DOI=10.1109/68.47067, number=2, journal=IEEE PHOTONICS TECHNOLOGY LETTERS, author=Noé, Reinhold and ZAH, CE and MAEDA, M and CANEAU, C and MENOCAL, SG and WAGNER, RE and LEE, TP, year=1990, pages=120–121 

@articleNoé_RODLER_GAUKEL_EBBERG_AURACHER_1990, title=POLARIZATION-INDEPENDENT AND PATTERN-INDEPENDENT OPTICAL FSK HETERODYNE SYSTEM USING DATA-INDUCED POLARIZATION SWITCHING, volume=26, DOI=10.1049/el:19900119, number=3, journal=ELECTRONICS LETTERS, author=Noé, Reinhold and RODLER, H and GAUKEL, G and EBBERG, A and AURACHER, F, year=1990, pages=176–177 

@articleNoé_RODLER_GAUKEL_NOLL_EBBERG_1990, title=HIGH-PERFORMANCE, 2-CHANNEL OPTICAL FSK HETERODYNE SYSTEM WITH POLARIZATION DIVERSITY RECEIVER, volume=26, DOI=10.1049/el:19900717, number=15, journal=ELECTRONICS LETTERS, author=Noé, Reinhold and RODLER, H and GAUKEL, G and NOLL, B and EBBERG, A, year=1990, pages=1109–1110 

@articleKitzerow_Crooker_Kwok_Xu_Heppke_1990, title=Dynamics of blue-phase selective reflections in an electric field, volume=42, DOI=10.1103/physreva.42.3442, number=6, journal=Physical Review A, publisher=American Physical Society (APS), author=Kitzerow, Heinz-Siegfried and Crooker, P. P. and Kwok, S. L. and Xu, J. and Heppke, G., year=1990, pages=3442–3448 

@articleKitzerow_Crooker_Kwok_Heppke_1990, title=A blue phase with negative dielectric anisotropy in an electric field. Statics and dynamics, volume=51, DOI=10.1051/jphys:0199000510120130300, number=12, journal=Journal de Physique, publisher=EDP Sciences, author=Kitzerow, Heinz-Siegfried and Crooker, P.P. and Kwok, S.L. and Heppke, G., year=1990, pages=1303–1312 

@articleKitzerow_Heppke_Schmid_Jérôme_Pieranski_1990, title=First optical observation of Kossel diagrams in chiral smectic phases, volume=51, DOI=10.1051/jphys:0199000510180208700, number=18, journal=Journal de Physique, publisher=EDP Sciences, author=Kitzerow, Heinz-Siegfried and Heppke, G. and Schmid, H. and Jérôme, B. and Pieranski, P., year=1990, pages=2087–2099 

@articleSchroeter-Wittke_1990, title=Im Advent kommt Gott uns entgegen. Anmerkungen und Anregungen für Verkündigung und Liturgie in der Vorweihnachtszeit, volume=8, number=6, journal=Zeitschrift für Gottesdienst und Predigt, author=Schroeter-Wittke, Harald, year=1990, pages=7–13 

@articleSchroeter-Wittke_Schröer_Bethge_1990, title=Erben sind wir auf jeden Fall. Über Forschung, Vermittlung und Gedenken. Ein Interview mit Eberhard Bethge , volume=42, journal=Der Evangelische Erzieher, author=Schroeter-Wittke, Harald and Schröer, Henning and Bethge, Eberhard, year=1990, pages=453–463