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Though the problems of realism and locality in physical theories is at least as old as modern quantum mechanics, the interest for that subject decreased considerablely after its great achivements. However, in the last decades, a very important research has been developed in this line, and we can safety say that neither the idea of reality, nor the locality, have been eliminated in physics, although this fact is still unkwon for the majority of the scientific community, von Neumann’s theorem on the theoretical side, and Aspect’s experiment on t lie experimental one. have created this misunderstanding. The construction of explicit models have clarified highly the scope of these results1,2,. But the construction of a model is not only important for refutal purpouses. of course. A model tries to reprent how Nature works, being of fundamental importance when one wants to deepen it and to really understand it.