Degenerations of Zinbiel and nilpotent Leibniz algebras
  We describe degenerations of four-dimensional Zinbiel and four-dimensional nilpotent Leibniz algebras over C. In particular, we describe all irreducible components in the corresponding varieties. 
Ivan Kaygorodov, Yury Popov, Alexandre Pozhidaev, Yury Volkov
math.RA