Keyword: Exterior sphere condition

Papers related to keyword:

• A. Marigonda - T. K. Nguyen - D. Vittone (Indiana Univ. Math. J.)
  Some regularity results for a class of upper semicontinuous functions (2013)
• T. K. Nguyen - D. Vittone (J. Convex Anal.)
  Rectifiability of special singularities of non-Lipschitz functions (2012)