On isomorphism classes and invariants of low dimensional complex   filiform Leibniz algebras (part 2)
  The paper is an implementation in low dimensional cases of the classification method presented before by Rakhimov and Bekbaev. We give a complete classification of a subclass of complex filiform Leibniz algebras obtained from the naturally graded non-Lie filiform Leibniz algebras. A hypothetic formula for the adapted number of isomorphism classes is given. 
I.S. Rakhimov, S.K. Said Husain