Morphology of open films of discotic hexagonal columnar liquid crystals as probed by grazing incidence X-ray diffractionEric Grelet, Sébastien Dardel, Harald Bock, Michel Goldmann, Emmanuelle Lacaze and Frédéric NalletEur. Phys. J. E, 31 4 (2010) 343-349DOI: https://doi.org/10.1140/epje/i2010-10586-2