In-plane X-ray diffraction from monolayers of perfluorinated fatty acids: evidence for azimuthal ordering in the condensed phase Michel Goldmann, Pierre Nassoy, Francis Rondelez, Anne Renault, Seokmin Shin and Stuart A. Rice J. Phys. II France, 4 5 (1994) 773-785 DOI: 10.1051/jp2:1994164