The Dimensional Recurrence and Analyticity Method for Multicomponent   Master Integrals: Using Unitarity Cuts to Construct Homogeneous Solutions
  We consider the application of the DRA method to the case of several master integrals in a given sector. We establish a connection between the homogeneous part of dimensional recurrence and maximal unitarity cuts of the corresponding integrals: a maximally cut master integral appears to be a solution of the homogeneous part of the dimensional recurrence relation. This observation allows us to make a necessary step of the DRA method, the construction of the general solution of the homogeneous equation, which, in this case, is a coupled system of difference equations. 
Roman N. Lee and Vladimir A. Smirnov
hep-ph hep-th