@articleKitzerow_Crooker_Heppke_1992, title=Chromaticity of polymer-dispersed cholesteric liquid crystals, volume=12, DOI=10.1080/02678299208029037, number=1, journal=Liquid Crystals, publisher=Informa UK Limited, author=Kitzerow, Heinz-Siegfried and Crooker, P. P. and Heppke, G., year=1992, pages=49–58 

@articleKitzerow_Crooker_1992, title=Behaviour of polymer dispersed cholesteric droplets with negative dielectric anisotropy in electric fields, volume=11, DOI=10.1080/02678299208029010, number=4, journal=Liquid Crystals, publisher=Informa UK Limited, author=Kitzerow, Heinz-Siegfried and Crooker, P. P., year=1992, pages=561–568 

@articleKitzerow_Xu_Crooker_1992, title=Microscopic observations of axial and radial nematic droplets for a dual-frequency addressable liquid crystal, volume=12, DOI=10.1080/02678299208032817, number=6, journal=Liquid Crystals, publisher=Informa UK Limited, author=Kitzerow, Heinz-Siegfried and Xu, F. and Crooker, P. P., year=1992, pages=1019–1024 

@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 

@articleHeppke_Jéròme_Kitzerow_Pieranski_1989, title=Observation of a hexagonal blue phase in systems with negative dielectric anisotropy, volume=5, DOI=10.1080/02678298908026387, number=3, journal=Liquid Crystals, publisher=Informa UK Limited, author=Heppke, G. and Jéròme, B. and Kitzerow, Heinz-Siegfried and Pieranski, P., year=1989, pages=813–828