Nucleon structure in a light-front quark model consistent with quark   counting rules and data
  Using global fits of valence u and d quark parton distributions and data on quark and nucleon form factors in the Euclidean region, we derive a light-front quark model for the nucleon structure consistent with quark counting rules. 
Thomas Gutsche, Valery E. Lyubovitskij, Ivan Schmidt, Alfredo Vega
hep-ph