2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/112074We discuss the known experimental data on the phase of the de Haas -van Alphen oscillations in graphite. These data can be understood if one takes into account that four band-contact lines exist near the HKH edge of the Brillouin zone of graphite.5 pages, 2 fifures. To appear in Physical Review B (B15)Other Condensed Mattertext