Biomechanical Classification of Judo Throwing Techniques (Nage Waza)
  In this paper it is applied the classic mechanical point of view to classify all the movements known as throwing judo techniques; the application of the Newtonian physical methods and principles is able to rationalize the whole matter and to group under only two very simple and clear principles all the movements, before grouped in many generic and not very clear way. 
Attilio Sacripanti (ENEA; University of Tor Vergata Rome; Italian   Wrestling, Weightlifting and Judo Federation)