Cholesterol stabilizes the hexagonal type II phase of 1-palmitoyl-2-oleoyl sn glycero-3-phosphoethanolamine. A solid state 2H and 31P NMR studyR Marinov and EJ DufourcJ. Chim. Phys., 92 (1995) 1727-1731DOI: https://doi.org/10.1051/jcp/1995921727