Classification of rational unicuspidal projective curves whose   singularities have one Puiseux pair
  It is a very old and interesting open problem to characterize those collections of embedded topological types of local plane curve singularities which may appear as singularities of a projective plane curve C of degree d. The goal of the present article is to give a complete (topological) classification of those cases when C is rational and it has a unique singularity which is locally irreducible (i.e. C is unicuspidal) with one Puiseux pair. 
J. Fernandez de Bobadilla, I. Luengo, A. Melle-Hernandez, and A.   Nemethi