A strange recursion operator for a new integrable system of coupled   Korteweg - de Vries equations
  A recursion operator is constructed for a new integrable system of coupled Korteweg - de Vries equations by the method of gauge-invariant description of zero-curvature representations. This second-order recursion operator is characterized by unusual structure of its nonlocal part. 
Ayse Karasu (Kalkanli), Atalay Karasu, S. Yu. Sakovich