Group analysis of variable coefficient generalized fifth-order KdV   equations
  We carry out group analysis of a class of generalized fifth-order Korteweg-de Vries equations with time dependent coefficients. Admissible transformations, Lie symmetries and similarity reductions of equations from the class are classified exhaustively. A criterion of reducibility of variable coefficient fifth-order KdV equations to their constant coefficient counterparts is derived. Some exact solutions are presented. 
Oksana Kuriksha, Severin Po\v{s}ta and Olena Vaneeva
math-ph math.MP nlin.SI