2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18162The Shubnikov - de Haas effect in quasi-two-dimensional compounds is studied. The conductivity is calculated from the Kubo formula. Two effects -- the field-dependent phase shift of the beats and the slow oscillations of the conductivity are explained and calculated. The results are applicable to the strongly anisotropic organic metals and other layered compounds.13 pages, no figuresStatistical MechanicsMesoscale and Nanoscale Physicstext