Quasiclassical calculations of Landau level spectrum for 20.5-nm-wide HgTe quantum well: "extremum loop” model and effects of cubic symmetry - S. V. Gudina; A. S. Bogolubskiy; V. N. Neverov; K. V. Turutkin; N. G. Shelushinina; M. V. Yakunin (Low Temperature Physics, 2021)