Free Field Representation of Level-$k$ Yangian Double ${\cal   D}Y(sl_2)_k$ and Deformation of Wakimoto Modules
  Free field representation of level-$k (\not=0,-2)$ Yangian double ${\cal D}Y(sl_2)_k$ and a corresponding deformation of Wakimoto modules are presented. We also realize two types of vertex operators intertwining these modules. 
Hitoshi Konno