Duchon, Philippe

• The Electronic Journal of Combinatorics Volume 17 (2010) - Research Papers
  Enumeration of Alternating Sign Matrices of Even Size (Quasi-)Invariant under a Quarter-Turn Rotation
  Abstract  PDF
• The Electronic Journal of Combinatorics Volume 23, Issue 4 (2016) - Papers
  Preserving the Number of Cycles of Length $k$ in a Growing Uniform Permutation
  Abstract  PDF  LaTeX sources  Official Source