McLean's second variation formula revisited
  We revisit McLean's second variation formulas for calibrated submanifolds in exceptional geometries, and correct his formulas concerning associative submanifolds and Cayley submanifolds, using a unified treatment based on the (relative) calibration method and Harvey-Lawson's identities. 
H\^ong V\^an L\^e and Jir\'i Vanzura
math.DG