Santilli, Mario Geometric Measure Theory, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
1701.07286.pdf (Preprint), 342KB
Santilli, M. (2019). Rectifiability and approximate differentiability of higher order for sets. Indiana University mathematics journal, 68(3), 1013-1046. doi:10.1512/iumj.2019.68.7645.