About the seventh-order Kaup-Kupershmidt equation and its solutions
  In this letter we obtain exact soliton and periodic solutions to the seventh-order Kaup-Kupershmidt equation. We make use of the Cole-Hopf transformation and two particular rational hyperbolic functions ansatze. 
Alvaro Salas (Universidad de Caldas, Universidad Nacional de Colombia,   sede Manizales), Jairo Ernesto Castillo Hernandez (...