ROLE OF PHONONS IN ORIENTATIONAL INTRA-PLANE ORDERING IN GRAPHITE INTERCALATION COMPOUNDS C. Horie, H. Miyazaki, S. Igarashi et S. Hatakeyama J. Phys. Colloques, 42 C6 (1981) C6-298-C6-300 DOI: 10.1051/jphyscol:1981686