F. Corni, V. Magnani: Area of intrinsic graphs in homogeneous groups (Submitted Paper) 2023 F. Corni, V. Magnani: Area formula for regular submanifolds of low codimension in Heisenberg groups Adv. Calc. Var. Vol. 3, p. 665-688, 2023 F. Corni, V. Magnani: Symmetry results for the area formula in homogeneous groups (Preprint) 2024